Synopsis for
Back to the Future Part II (1989) More at IMDbPro »

The movie opens where Back to the Future left off: October 26, 1985. Marty (Michael J. Fox) opens the garage door and sees his 4X4, the one he longed for in Back to the Future. Jennifer (Elisabeth Shue) asks for a ride. Marty tells her that she is a sight for sore eyes, and wants to look at her. She says that he's acting like he hasn't seen her for a week. She asks if he's OK. When he sees his mom and dad, he says yeah. Suddenly Doc (Christopher Lloyd) appears in the DeLorean and smashes into one of the trash cans. He tells Marty that he has to come back with him. Marty sees his strange goggles and asks, "Where?" Doc says, "Back to the future!" Doc opens one of the trash cans, and then grabs some banana peels and a discarded beer can. Marty asks him what he's doing, and Doc says he needs fuel. He opens the attached Mr. Fusion Home Energy Reactor, and puts the banana peels in, topping it off with the beer. Doc tells Marty to get in the car, but Marty protests, saying he just got here, and Jennifer and he are going to take the new truck for a spin. Doc tells Marty that they'll take her along, because this concerns her too. Marty wonders what happens to them in the future, Doc replies that they come out fine, but that something has to be done about their kids. After they get in, and Doc backs up into the street, Marty tells Doc that he had better back up, because they don't have enough road to get up to 88 MPH. Doc says, "Roads? Where we're going, we don't need roads." Biff (Thomas F. Wilson) comes out of the house, and wants to show Marty the matchbooks he just got printed up for his auto detailing service. He sees the DeLorean fly away. He wonders how a DeLorean can fly.

They reappear in the year 2015, in the sky. They're stuck in traffic, going the wrong way! Doc crosses to the right direction. They descend to Hill Valley on October 21, 2015. Jennifer is confused, and Marty tells her they're in a time machine. She asks about their future, the wedding, and where they will live. Doc knocks her out with a sleep inducing "alpha rhythm generator." He tells Marty that when she wakes up she'll think it was a dream. He says he did that because she was asking too many questions about her future, and she's not essential to his plans.

The DeLorean lands in an alley. It's raining. Doc tells Marty to wait 5 more seconds, and the rain stops. Doc says they have an efficient weather service now. When Marty gets out, Doc peels off a rubber mask, saying he went to a rejuvenation clinic. He says they added 30 or 40 years to his life. (But he looks the same.) Marty asks about his own future, if he'll be a rich rock star. Doc tells Marty that no one should know too much about their future. He tells Marty to change his clothes. Meanwhile, Doc spies on Marty Jr. (Michael J. Fox), saying they're precisely on schedule. Marty's future clothes have power laces on the shoes, and a self-adjusting fit on the jacket. Doc tells him to pull out his pants pockets, because all kids wear them like that. He gives Marty a multi-colored cap like his son, then tells him to go into the Café '80s in exactly 2 minutes and say no to a guy named Griff. (Marty is going to impersonate his own son.) They put Jennifer down in the alley. Doc shows Marty tomorrow's copy of USA Today, explaining what happens to his son: Martin McFly Jr. arrested for theft on October 22, 2015; within 2 hours of his arrest, he was tried, convicted, and sentenced to 15 years in the state penitentiary. Doc tells Marty that the justice system works swiftly in the future because they abolished all lawyers; when Marty's daughter tries to break Marty Jr. out of jail next week, she is sentenced to 20 years, causing a chain reaction that destroys his entire family. Doc's alarm watch is late, but he will try to intercept the real Marty Jr. He warns Marty about Griff, Biff Tannen's grandson, who engineers the robbery that Marty Jr. participates in and that Marty should tell Griff he won't join him in the theft. Doc also warns Marty that Griff has some short circuits in his bionic implants.

When Marty reaches the town square, he notices a small lake in the middle where the park used to be. A car is in the robotic Texaco service station. A movie theater is showing "Jaws 19". Suddenly a hologram of a giant shark comes from the theater, swoops down on Marty and "bites" him, scaring him. He asks like he wasn't scared. An electronic billboard advertises Wilson Hover Conversion Systems. Marty sees an antique shop, where he notices unusual items like a B&W Macintosh computer, a lava lamp, and a sports almanac. The almanac lists sports results from the years 1950 to 2000.

Marty goes into the Café '80s, which is full of nostalgic items from the 1980s. Several video screens are advertising the food & drink there; they are also the waiters. The screens use personalities from the 1980s: Michael Jackson, Ronald Reagan, and the Ayatollah Khomeini. They talk like Max Headroom. While waiting on Marty, Ronald and the Ayatollah talk at the same time, almost as if arguing. Marty tells them to stop, that he only wants a Pepsi; one quickly pops up. Biff (Thomas F. Wilson), now an old man, walks to Marty, tells him that he's Marty McFly's kid, then tells him that his father screwed up his life. Marty thinks Biff is talking about himself, and is confused. Biff knocks him on the head with his cane saying, "Hello, McFly, anybody there?" Outside, Griff (Thomas F. Wilson) lands his car. He comes in and tells his grandfather Biff that there should be two coats of wax on his car. Biff argues, but Griff makes him go outside and redo it. Marty asks Biff if he and Griff are related, and Biff knocks him on the head again before he leaves. Marty notices two boys turn on an antique shooting game. Marty grabs the gun and shoots all the opponents, but they say it's like a baby's toy because you have to use your hands; they leave. Marty Jr. peers in through the window; his sleeves are ill-fitting. He comes in and asks for a Pepsi. Marty hides behind the counter. Griff and his gang (Ricky Dean Logan, Darlene Vogel, and Jason Scott Lee) come in. Griff confronts Marty Jr. in the typical Tannen way, and punches him. He asks Marty Jr. if he made a decision about "tonight's opportunity." Marty Jr. says it might be dangerous, that he has to discuss it with his father. Griff throws him behind the counter. Marty tells Marty Jr. to stay down and shut up; Marty Jr. faints. Marty jumps out from behind the counter, dressed like his son and pushes Griff. Marty tells Griff, "The answer's no." Griff calls Marty chicken, hiding a telescoping bat behind his back. Marty, being Marty, can't resist when someone calls him chicken, and says, "Nobody calls me chicken." Griff swings at Marty and misses, hitting a video waiter. When Marty puts up his dukes, Griff rises up about half a foot (using his implants). Marty throws a punch at Griff, who easily blocks it. Marty kicks Griff between the legs and pushes him against his gang. Marty runs out the door, and Griff and his gang run after him.

Outside, Biff is waxing Griff's car. Marty passes him and sees two kids with what he thinks are scooters. When he grabs one of the "scooters", he's surprised it's a hoverboard. As in Back to the Future, he rips off the handle for the board, giving the girl the handle. Griff and his gang chase after Marty with their hoverboards. Marty hangs onto the back of a passing Jeep. Biff says, "There's something very familiar about all of this." Marty grabs onto a rope from the Jeep's back, like a water surfer. When Griff swings at him, Marty swerves over the water, and the board stops. The gang tells Marty that hoverboards don't work over water "unless you've got power." Griff gets out his "Pit Bull", a jet-powered hoverboard, ready to hit Marty with his bat. The gang hooks up to the back of the Pit Bull, and all four of them fly across the water towards Marty. At the last second, Griff swings, but Marty jumps down into the water, and Griff misses. The gang fly out of control through the glass windows of the courthouse. Marty climbs out of the water in time to see the gang arrested, then goes through a pedestrian tunnel and exits out the other side. He pulls a cord on his jacket, and it dries itself and his hair. Marty tries to give the girl back her hoverboard, but she says she has a Pit Bull now. A man asks for a donation to save the clock tower. An electronic billboard flashes that the Cubs win the World Series, sweeping Miami. Marty is incredulous about Miami. The man then tells Marty he wishes he could go back to the beginning of the season and put some money on the Cubs. This gives Marty an idea.

Marty goes back to the antique shop and buys the sports almanac. He goes outside, looking inside the almanac, and says he can't lose. Doc arrives and tells Marty to wait. Biff comes around the corner and sees the flying DeLorean. He remarks that he hasn't seen one of those in 30 years. Marty Jr. comes out and bumps into Biff. Biff looks back and forth at Marty and Marty Jr., confused. A car almost hits Marty Jr. Doc looks at the courthouse and asks Marty what happened. Marty says, "My kid showed up and all hell broke loose". Doc sits down and says he was afraid of this. He says that after he zapped Jennifer with the sleep inducer, there wasn't enough power to knock his son out for a full hour. Biff sees Doc and hides. Marty tells Doc that the newspaper is changing. As they watch, the headline changes: GANG JAILED; HOVERBOARD RAMPAGE DESTROYS COURTHOUSE; GANG LEADER: I WAS FRAMED. They look over and Griff is just saying this now. Doc tells Marty that his son won't go to jail; future history has been changed. He tells Marty that they succeeded, and can get Jennifer and go home. Marty accidentally drops the almanac and Doc picks it up. Doc tells Marty that he didn't invent the time machine for financial gain. Doc starts to put the almanac in the trash, but sees the police; they hide around the corner. The police (Mary Ellen Trainor and Stephanie Williams) have found Jennifer, and ID her with a handheld device: "McFly, Jennifer Jane Parker, 3793 Oakhurst Street, Hilldale, age 47." They are surprised she looks so young. Doc tells Marty that because the thumbprint never changes over the years, they assume she's the Jennifer of the future. Marty tells Doc that they have to stop them. Doc asks him, "What will we say, that we're time travelers? They'll have us committed." One of the cops says she's clean (i.e. no outstanding warrants), so they can take her home to Hilldale. Doc tells Marty that the cops are taking Jennifer to Marty's future home. He says they can arrive there shortly after the cops do and take her back to 1985. Marty is excited about seeing his future home and himself as an old man. Doc says no, then panics. He says, "Jennifer could conceivably see her future self. The consequences could be disastrous. There are two possibilities: 1. Face-to-face with her future self, she simply passes out. 2. The encounter creates a paradox, which starts a chain reaction and unravels the very fabric of the space-time continuum and destroy the entire universe." The police car flies by, and Doc and Marty hide against the wall. Doc hopes that they can find Jennifer before she finds herself. Looking at the digital sign, Doc says the skyway is jammed, and will take forever to get there. Doc tells Marty he didn't invent the time machine to win at gambling; he invented it to travel through time. He throws the almanac in a trash can, and they leave. Biff was hiding past a screen door, comes out, and retrieves the almanac.

The Hill Valley Police arrive in Hilldale at night, and land at the McFly (2015) house. One cop says that Hilldale is "nothing but a breeding place for tranks, lobos, and zipheads." The other one agrees, saying that they should tear it down. The cops take Jennifer to the house, and use her thumbprint to open the front door. When she wakes, they tell her she got a little "tranked", but can walk. They tell her it's dangerous without the lights on. She asks, "Lights on?" The lights come on, and they sit her down on the couch. One of the cops tells her to be careful in the future. Jennifer asks, "The future?" The cops leave. Jennifer looks at the window in front of her, but sees a giant video screen, broadcasting the 24 hr/day scenery channel. She says to herself that she's in the future. Her daughter walks around upstairs, but they don't see each other. Jennifer sees framed wedding photos of her and Marty, and picks one up. She's incredulous (and disappointed) that she gets married in "The Chapel of Love?" When the doorbell rings, Jennifer's daughter (Michael J. Fox), identified as Marlene when her grandparents George and Lorraine come in, asks, "Mom is that you?" Jennifer drops the photo and tries the front door, but there's no doorknob. The doorbell rings and Jennifer hides in the closet under the stairs. Jennifer looks through the slats of the closet door, but can't see her daughter as she opens the front door. Lorraine (Lea Thompson) and George (Jeffrey Weissman) come in. Marlene asks what happened to her grandpa's back. Lorraine says he threw his back out again on the golf course. George floats in upside down. Lorraine asks Marlene if her folks are home yet. Lorraine is holding a small pizza in a sandwich bag, saying she bought pizza for everyone.

Doc, Marty, and Einstein are flying in the DeLorean, stuck in traffic. Doc says that old Jennifer (Jennifer 2015) usually gets home around this time, and he hopes they're not too late. Doc grabs his goggles worriedly. Marty asks him what's the matter. Doc says he thought he saw a taxi in his rear display that he thought was following them.

Inside the McFly house, Lorraine is changing channels on the screen scene, saying she can't believe the window is still broken. Marlene says that when the repairman called her dad chicken, he threw him out of the house, and now can't get anybody to fix it. Lorraine lifts it up, revealing the window. She tells Marlene that her father's biggest problem is that he loses all self-control when somebody calls him chicken. Lorraine and George say together, "Mom, I can't let them think I'm chicken." Lorraine continues: "About 30 years ago, your father tried to prove he wasn't chicken, and he ended up in an automobile accident." Marlene asks, "Oh, you mean with the Rolls-Royce?" Lorraine says, "Mm-Hmm." All three go into the kitchen. Jennifer mutters, "Automobile accident?"

The DeLorean lands outside the McFly house at night. Doc gets out, taking Einstein with him to find Jennifer. Doc tells Marty to stay there and change clothes. Marty protests, but Doc says they can't risk him running into his older self. Doc runs away with Einstein. Marty is pleasantly surprised that he will live in Hilldale. The taxi that was following the DeLorean in traffic arrives, landing down the street. After Biff pays with his thumbprint, he sneaks and hides by a waste recycling station.

Lorraine continues her narrative: "That accident started a chain reaction that sent Marty's life straight down the tubes. If not for that accident, your father's life would have turned out very differently." (Jennifer gets out of the closet.) The man in the Rolls Royce wouldn't have pressed charges and Marty wouldn't have broken his hand, and he wouldn't have given up on his music. And he wouldn't have spent all those years feeling sorry for himself" Jennifer hears the door open and hides in the den closet when Marty Sr. (Michael J. Fox) comes in. She watches as Marty Jr. turns on the TV and watches several channels at the same time.

Outside, Marty is fascinated by a robotic dog walker and carelessly leaves the DeLorean's door open when he follows the dog. Biff gets in and then flies away.

Lorraine puts the Pizza Hut pizza in a Black and Decker Hydrator, and it's ready in only 3 seconds, restored to full size and cooked. Lorraine is worried about Jennifer. Marty Sr. doesn't know where Jennifer is. He says she's probably in one of her moods. The phone rings, and Marty Sr. takes it on the large video phone in the den. It's his coworker, Needles (Flea), who wants Marty Sr. to join him in an illegal business venture. Marty Sr. balks, but Needles calls him chicken. Marty Sr. says he'll do it & scans his card, and then Needles hangs up. Marty Sr.'s boss, Ito Fujitsu (Jim Ishida), comes on the phone almost immediately, telling Marty Sr. that he was monitoring the card scan. He promptly fires Marty Sr. and sends out a fax saying "YOU'RE FIRED!!!" to all the fax machines in the house. Jennifer takes one of the faxes. Doc knocks on the window and tells Jennifer to go out the front door and meet him there. She says the door won't open, and he tells her to press her thumb to the plate. She tries to sneak out, but Marty Sr. is playing the guitar in the living room. Lorraine talks with him and they both leave the living room. Jennifer tries to leave, but Jennifer (2015) (Elisabeth Shue) opens the door and Jennifer hides behind the wall. When Jennifer (2015) comes in they both faint, shocked at seeing each other. Doc catches Jennifer.

Old Biff returns in the DeLorean. When he gets out of the car, he pulls out his cane too quickly and hits himself in the chest, breaking off the top of the cane in the car as he leaves. Doc calls Marty over, telling him that she fainted when she saw her old self, but she'll be fine. As they carry Jennifer back to the DeLorean, Doc tells Marty that when they get back he's going to destroy the time machine, saying that this shows the danger of time travel. They put her in the DeLorean. Doc tells Marty he wants to go to the Old West but it's too dangerous. He puts some garbage in Mr. Fusion.

Doc, Marty, Jennifer, and Einstein go back to 1985 at night. Doc and Marty put Jennifer in the swing on the porch of her house. Doc tells Marty to come back later in his truck and wake her up, and try to convince her it was a dream. Doc says she will probably sleep for a couple of hours. Marty remarks that he doesn't remember bars on the windows. Doc drives to Marty's house, but they don't don't notice the graffiti on the lion statues of Lyon Estates. Doc leaves. Marty can't open the gate to his back yard because it's locked with a padlock, so he jumps the fence. He opens the window to his bedroom and falls onto a bed in the room. A Black girl wakes up and screams "Rape." Her father runs in and attacks Marty with a baseball bat. He swings several times, but misses him, hitting everything else. Marty runs out the front door. The man yells after him, saying to tell the real estate company that they won't sell.

Marty runs down the street, which is lined with wrecked and abandoned cars. He sees an outline of two dead people and keeps running. Three police cars race by, their sirens blaring and lights flashing. Marty says that it must be the wrong year. He finds a newspaper on the porch of a house that reads November 26, 1985. Suddenly, his old principal, Mr. Strickland (James Tolkan), bursts out of the house and points a shotgun at Marty. Strickland doesn't recognize him. Marty asks him why he doesn't recognize him from school. Strickland says the school burned down 6 years ago. Some guys drive by in a car and shoot at Strickland. Strickland shoots back and Marty runs away. He passes and recognizes Red the Bum (George 'Buck' Flower). Red says, "Watch where you're going, crazy drunk pedestrian." (This scene is reminiscent of a scene in Back to the Future.) Marty turns around and sees a huge casino called "Biff Tannen's Pleasure Paradise". Bikers are everywhere. A tank passes by in the street; the whole place looks like a war zone. There is a toxic waste reclamation plant across the street. In the lobby of the casino, a video in the museum narrates Biff's life and success: getting rich; founding Biffco; legalizing gambling; converting the dilapidated courthouse into a casino hotel; dating famous women. (It shows him with Marilyn Monroe and Jayne Mansfield.) As Biff's history continues, Marty sees that Biff is now married to his mother and he screams. Biff's goons appear and knock Marty out.

Marty wakes up in the dark and sees his mother (Lea Thompson), asking if that's her. She tells him to relax, that he's been asleep for almost 2 hours. He thinks it was a nightmare. She tells him that he's safe and sound on the 27th floor and turns on the lights. He bolts up and sees that she now has very large breasts. She wonders what's wrong, and he stares at her chest, saying, "You're so big!" She tells Marty to wait for his father. Marty asks, "Father?" Biff bursts in and sees Marty, and asks why he's not in Switzerland. Biff tells Lorraine that Marty is a butthead just like his father. Lorraine defends George, telling Biff that he's not even half the man he was. Biff pushes her down. Marty rushes at Biff, but Biff's men grab Marty. Biff punches Marty in the stomach. Lorraine tells Biff she's leaving. Biff asks her who will pay for her clothes, jewelry, liquor, and cosmetic surgery. She tells him that he's the one who wanted "these things", cupping her breasts. He tells her that he'll cut off not only her but her kids too. He'll cancel her daughter Linda's credit cards, revoke her son Dave's probation, and put Marty and them all in jail, just like her brother Joey. Lorraine agrees to stay. Biff leaves, saying that he'll be back in an hour but Marty better not be. Lorraine tells Marty that Biff was right and she was wrong, and then pours herself a drink. Marty is shocked, wondering how she could leave his father for Biff. She says that they must have hit Marty too hard this time. Marty asks where his father George is. She says that he's where he's been for the past 12 years, at Oak Park Cemetery.

Marty goes to the cemetery, and finds his father's gravesite. It shows that he died on March 15, 1973. Marty is stunned and Doc steps out of the shadows, saying it's all true. Doc says he knew Marty would come here when Marty learned about his father. Doc and Marty go to Doc's lab. Doc shows Marty newspapers from the library, which was closed down. Marty tears out the page of the newspaper that reports his father was murdered. Doc explains that something caused a temporal distortion; somewhere in the past, the timeline skewed off into an alternate reality. On a chalkboard, he draws the normal timeline and the alternate timeline (1985A), which is normal for everyone else. Doc shows Marty the bag and receipt for the almanac, and Biff's cane top that he found in the DeLorean. Doc tells Marty that Biff stole the time machine and gave the almanac to himself in the past. He then shows Marty a newspaper that reports how Biff got rich at the racetrack in 1958. Marty uses the magnifying glass to see the almanac in Biff's pocket. Doc says this is how time travel can be misused. Marty says that it's his fault, and they have to go to the future to stop Biff from stealing the time machine. Doc tells him no, that they would only go to THIS future where Biff is corrupt and powerful, and married to Marty's mother. He also shows Marty a newspaper showing himself committed to an insane asylum. He tells Marty that they have to go the past and get the almanac, and they have to find out how and when Biff got the almanac. Marty says he will ask him.

Biff is in a jacuzzi with two topless women, watching "A Fistful of Dollars" on TV. (The importance of this movie will become apparent in Back to the Future Part III.) Marty comes in and turns off the TV with the remote. He says that the party's over, and tosses the remote in the tub. He says there's a matter they have to talk about: Grays Sports Almanac. Biff sends the women out. He asks Marty what else he knows about the book. Marty tells Biff that he should tell him how, where, and when he got the book. Biff tells (orders) him to sit down. He says, "November 12, 1955", then opens a safe. Marty says that was the date of the lightning storm. Biff says that it was a Saturday, and he crashed his car drag racing. Marty says that he crashed into a manure truck, that his father told him about it before he died. Biff continues, saying that a crazy old codger gave him the almanac, asking him how would he like to be rich, and that he's a distant relative. Biff says he didn't see the resemblance. Biff says the old guy told him he's going to be rich, and when Biff asked what is the catch, the old guy told him, "No catch; just keep it a secret." Biff says he never saw him again. While Biff turns his back to put the almanac back in the safe, Marty takes one of the matchbooks from an ashtray. Biff says the old man also told Biff that "Someday a crazy wild-eyed scientist or a kid will show up. If that ever happens..." Biff pulls out a snub nose revolver, saying he didn't think it would be Marty, and points it at him. Marty throws the ashtray at Biff, but he ducks and the ashtray sticks into Biff's chair. Marty runs upstairs, and Biff shoots at him several times, but misses. The three guys who grabbed Marty outside see him go downstairs, but he jumps the other flight of stairs and goes back upstairs to the roof instead, while they go downstairs. Biff catches up and sees the door to the roof swinging, and follows Marty. He tells Marty to jump, that suicide would be nice and neat. Marty tells him the police will trace the bullet, but Biff says he owns the police; they couldn't match the bullet that killed his father. Biff says it's poetic justice: two McFlys with the same gun. Marty jumps over the ledge and Biff can't believe it. He calls Marty an idiot, and then looks over the ledge. Marty comes up on the DeLorean, and the door knocks Biff out. Doc and Marty fly away. Doc sets the time machine for November 12, 1955. The display malfunctions and shuts off; Doc hits it and it returns. Doc tells Marty it's unbelievable that old Biff chose that date, that it must have cosmic significance.

Doc and Marty immediately go back to 1955 and hide the DeLorean behind a billboard covered with streamers, advertising Lyon Estates, which is next to the undeveloped farmland. Doc tells Marty he will repair the short in the time circuit, and to be careful not to run into his other self. He gives Marty some 1955 money from an emergency money suitcase, and tells him to buy some inconspicuous clothes.

In the daytime, Marty has a pair of binoculars and is dressed in a leather jacket and wearing a hat, like a spy. He sees Biff leave his grandmother's house (where he lives too) and throw some kids' ball onto the roof of a house. He follows Biff into town. The song "Mr. Sandman" plays in the background. The mechanic who repaired Biff's car drops it off, and Biff argues with him over the bill. Marty hides in the back of the car. Biff and the mechanic cross the street to get some motor oil. Old Biff watches, laughing because he remembers the manure. Biff and the mechanic return to the car, and the mechanic drives away in his tow truck. Biff sees Lorraine with her friend across the street, and he goes over to harass her. He wants her to go with him to the dance, but she says she's going with Calvin Klein (Marty's alter ego in Back to the Future). She tells Biff that she wouldn't go with him even if he had a million dollars, and he says that she would, that some day he's going to marry her. Biff goes back to his car and finds old Biff sitting in the driver's seat. Biff tells old Biff to get out, but old Biff starts the car, shocking Biff. Old Biff tells Biff to get in, telling him it's his lucky day. They drive to Biff's house, and Biff wonders how old Biff knew where he lives. Old Biff gives Biff the almanac, saying it will make him rich. Old Biff explains that it lists sports results from 1950 to 2000. Biff tosses it back and tells old Biff to "Make like a tree and get out of here." Old Biff says, "It's leave, you idiot!" He turns on the radio, and surprises Biff when he announces that UCLA, trailing 17-16, will win 19-17. UCLA wins 19-17. Old Biff tells Biff to bet on the winner, and gives Biff back the almanac. Biff tosses it in the back of the car, but old Biff grabs it before Marty can and stuffs it into the back pocket of Biff's pants. Old Biff and Biff close the the garage door and walk away. Old Biff is telling Biff about "a kid and an old crazy man who claims to be a scientist." Marty gets out of the car and tries to follow them, but the garage door is locked with a padlock. He calls Doc on his walkie-talkie, telling him Biff and old Biff left with with the book; he's at 1809 Mason St., locked in Biff's garage. Doc says he'll find a way to get there without a car. Biff comes back and argues with his grandmother. He opens the garage and gets in the car to go to the dance. Marty gets in the back of the car without Biff noticing. Doc passes the car just after they leave and sees the open garage door, wondering where Marty is.

Biff listens to "Papa Loves Mambo" by Perry Como on the radio. Marty calls Doc. Doc sees the tarp that covers the DeLorean. Marty tells Doc they are going to the dance. Doc tells Marty that they need a new plan; it's too dangerous. Marty tells Doc that he's in Biff's car. Doc tells Marty that he must not let his other self see him because of the consequences. Doc (1955) asks Doc to get a wrench from the toolbox. Doc asks him if he's doing a weather experiment, surprising him. Doc says that he has experience in this. Doc (1955) says that maybe they'll bump into each other in the future. Doc rides away on his bicycle. Doc (1955) looks at the back of Doc's head, and does a double take.

Biff (and Marty) arrive at the dance. Biff takes the almanac with him; Marty follows Biff inside. The band is playing and students are dancing. Marty sees through the binoculars that George is dancing alone. He also sees Biff's gang spiking the punch with liquor, and sees the almanac in Biff's back pants pocket. He then sees Strickland. Biff and his gang leave; Marty follows them. Biff tells his gang that he's still looking for Calvin Klein because he caused $300 damage to his car. The gang goes back inside, but Biff stays outside, and reads the almanac after tossing the liquor bottle away. Marty sees his counterpart drive up with Lorraine. He sees the almanac in Biff's back pocket, and jumps down. Biff looks around but doesn't see anyone. When Marty reaches for the almanac, Strickland surprises Biff, who turns around. Strickland says he smells alcohol. He grabs the almanac, calling Biff a slacker, and walks away; Marty secretly follows him. Strickland goes to his office and drinks coffee, spiking it with liquor. Marty enters quietly, but hides under the desk when the door noisily swings shut. When Marty reaches for the almanac, Strickland backs up in his chair against Marty's hand; Marty stifles a scream. Strickland leaves and tosses the almanac in the trash can. Marty retrieves the almanac, but finds out it's a girlie magazine; only the cover was from the almanac. He calls Doc and tells him that Biff must still have the almanac. Through the window, the camera shows Biff twisting the arm of George. Marty hears the ruckus and runs outside. He arrives just as George punches Biff, and sees his counterpart and the crowd. Marty's counterpart looks at the photo (as before) and runs away. Marty tells the crowd to back off, and then tells them he knows CPR. A guy asks, "What's CPR?" Biff wakes up, but Marty punches him and knocks him back out, then takes the almanac. Biff's gang chases Marty. Doc is trying to fly, and the time machine's display changes to January 1, 1885. At the dance, Marty sees George and Lorraine, and his 1985 counterpart. George and Lorraine kiss. Biff's gang enters, and Marty hides under a table. The gang sees Marty's counterpart on stage, and prepare to get him. Marty calls Doc, who tells him his counterpart will miss the lightning bolt at the clock tower. Doc tells Marty he has to help his counterpart at all costs, or there will be a time paradox.

Biff gets up and asks where Calvin Klein is. The "CPR kid" tells Biff where he (Marty) went, and thinks he took Biff's wallet, so Biff goes into the building. Marty sees Biff's gang backstage. He goes backstage to the other side. He climbs up into the overhead and pulls the ropes, releasing the stage weights (bags) on the gang just as Marty's counterpart finishes playing the high note. Marty swings down and drops the bags again, knocking the gang out. Marty calls Doc, who tells him to meet on the roof of the gym in one minute. Marty leaves, and through the door window sees his counterpart talking to Lorraine and George. Biff comes up next to him, and calls him butthead, saying that he's not fooled by that disguise. Marty leaves, but Biff asks if he's chicken. Marty turns around, saying that nobody calls him a chicken. Marty's counterpart slams the door open, knocking down Marty. Biff sees the almanac; he kicks Marty for taking the almanac and for his car, and drives away. Marty goes to the roof of the gym and tells Doc that Biff took it. They follow Biff, flying over him in the DeLorean. They sneak up quietly behind Biff's car. Marty gets on the hoverboard, hiding behind the back of Biff's car, and Doc flies away. Biff thinks he heard something and looks around. Marty goes to the passenger side of the car and sees the almanac. Biff, listening to sports on the radio, reaches for the almanac to check the scores just announced, and then puts it back on the seat. Marty opens the door, but Biff sees him. They both grab the almanac. Biff swerves around, telling Marty to let go of the car. Biff goes toward the tunnel, trying to smash Marty against the wall, but Marty swings aside. When Marty tries to sneak in, Biff punches him. They're now on the wrong side of the street, but Biff swings back before a truck hits them. Marty grabs the almanac and jumps down, and Biff turns around. Biff revs the engine and Marty tries to get away on the hoverboard. As Biff races towards Marty, it's doubtful that Marty will reach the end of the tunnel before Biff runs him over. Marty reaches the end of the tunnel in time and grabs a streamer that Doc lowered from the DeLorean, lifting him clear of the tunnel. Biff, racing out of control, doesn't see a manure truck in time to avoid it. He hits the back of it and manure dumps into his car. He screams, "Manure! I hate manure!"

Doc and Marty return to the billboard, still nighttime. Doc lowers Marty to the ground on his hoverboard. A storm is creating turbulence, so Doc has to come around from another direction to land. Doc asks Marty about the almanac, and tells him to burn it. Marty puts it into a bucket and burns it with matches from Biff's casino. When he does so, the words on the change from "(Biff's) Pleasure Paradise" to "Auto Detailing". The newspaper headline changes from "GEORGE MCFLY MURDERED" to "GEORGE MCFLY HONORED". Marty calls Doc, telling him that the newspaper changed and his father is still alive. Doc sees another newspaper headline change from "EMMET BROWN COMMITTED" to "EMMET BROWN COMMENDED", and says, "Mission accomplished." Marty asks Doc if everything is back to normal, if Jennifer and Einstein are okay. Doc says yes, it's the ripple effect, and that they can go back to the future. A lightning bolt strikes a tree across the street from Marty, and he ducks. Doc says he (Doc) almost bought the farm. Lightning strikes the DeLorean, and it vanishes in a puff of smoke. Marty is horrified that Doc is gone, and tries unsuccessfully to call him. The streamer drops to the ground, the end smoking. It starts raining, and a car approaches Marty and stops. A man gets out of the car and asks Marty if his name is Marty McFly; Marty says that it is. The man says he has a letter for Marty, and takes a large envelope out of his coat. Marty says that it's impossible. The man is from Western Union, and says they've had the letter for the last 70 years, with instructions to deliver it to Marty at this exact place and time. The man lost a bet whether or not Marty would be there. Marty signs for the folder; opening it to find a letter from Doc. He reads the letter aloud as the man listens. Doc says that he's alive and well. Marty says excitedly that Doc is alive in the year 1885, in the Old West. The man asks Marty if he needs any help. Marty replies that there's only one man who can help him, and runs away.

Doc's counterpart has just finished helping Marty's counterpart return to 1985, and is running down the street laughing. Marty runs to him and grabs him from behind. Doc is shocked, saying that he just sent Marty back to the future. Marty says that he's back from the future, and Doc faints. Marty tries to revive Doc.

The movie ends with a title card reading "TO BE CONCLUDED..." and previews of Back to the Future Part III.

Synopsis written by Mu_Ve_Watchr_89.