Police officers and paramedics rush between emergencies as each unit breaks in a new recruit: Ty, a rookie cop following in his father's footsteps, and Carlos, a former foster kid working toward medical school.
After Bosco has sex in his squad car with the boss' daughter, his boss gets a videotape of it. Bobby and Kim argue heatedly. Doc brings Carlos along on a personal mission to locate the owner of a lost watch.
Rookies Carlos and Davis experience disillusionment with their new jobs and their training officers. Bosco struggles withhomophobia. A teenage junkie destroys Kim's faith in humanity, but Bobby restores it.
Bobby visits his older brother in prison and tries to express his feelings to Kim. Davis and Sully's working relationship improves,but Doc and Carlos get into a fistfight. Yokas tells Bosco not to lie for her.
Bosco brutalizes a murder suspect. Sully goes to a movie with Davis' mother. Carlos attempts to revive a premature fetus whose mother he accidentally injured. Bobby welcomes his brother home from prison.
On Thanksgiving Day, Bosco tries to resolve a family conflict in a restaurant, while Yokas attempts the same at home. Bobby'smother will not allow her son Matty to attend the family's holiday celebration.
Davis inadvertently endangers a youth he's trying to help. Doc learns that his father's drug overdose was not accidental. Thecombined effort of police, paramedics and firefighters is required to get an extremely obese woman to the hospital.
An illegally parked car delays the firefighters, causing a woman's death. Western medicine kills Doc and Carlos' Chinese patient.The suicide of his first partner causes Sully to reflect on his own life.
Candyman risks his life for Davis. Matty hides from the police. Bobby and Kim get closer. Carlos is upset about Doc'srelationship with Morales. Yokas is enraged by Bosco's treatment of a wounded thief.
A gunman is targeting gays, prompting a vigilante response from the community who feels the police aren't doing enough. Faith arrests her husband for drunk driving, Ty tries to help a young man whose sister he arrested, Carlos gets involved with a pretty patient, and Bobby and Kim deal with the fallout from their night together.
Police mount a massive search when a toddler disappears from the scene of a traffic accident. Violence follows Sully's encounterwith his former priest. Carlos is going to be a father, and Doc is disgusted. Morales and Doc plan their next move.
Bobby saves a carjacker trapped inside a burning auto. Vangie complains to Carlos' superiors. Davis inadvertently foils aninvestigation of Candyman for corruption. Bobby hears that Matty is panhandling.
After being severely shot in the season finale, firefighter Doherty fights pain and fear when he returns to the station a bit prematurely for a full day of emergencies, but he can't admit to himself that his physical weakness prevents him from peak performance -- and his stubborn pride just might get himself and other fire personnel killed. Meanwhile, a reserved female firefighter (guest star Amy Carlson) transfers in under a cloud of suspicion after she previously charged a popular fireman with sexual harassment.
Carlos is rebellious and unaffected by the tragedies around him. During sensitivity training, however, he proves that he has a genuine passion for helping people. Doherty gets scared when he finds out that his former lover is pregnant.
The cast of "Third Watch" interviews real-life New York City firefighters, police and paramedics who were the rescue and safety workers after the terrorist attacks on New York City on September 11, 2001.
The evening of September 10, 2001... Bosco tries to avoid the results of a big match so he can watch it on tape later; Faith is waiting for her biopsy results; Sully and Ty go out on the eve of Sully's wedding to Tatiana; Jimmy is having trouble sleeping... and then morning comes around and it is September 11th, in New York City.
It's September 21, 2001 and the squads continue to battle through their emotions and their misgivings about their hero status, while working double shifts and spending every free moment at "the pile" searching for the missing; Kim returns to work and teams up with Doc, which allows an emotionally frayed Alex to return to paramedic duty; an exhausted Sully attempts to co-exist with his prospective in-laws while he waits for an opportunity to marry Tatiana.
Doc's colleagues nominate him as their choice for the "Paramedic of the Year" award but he is questioning his life choices. Faith is worried about her health while Kim worries about loosing Joey's custody to Jimmy.
No one can find Bosco after a sexual assault suspect is found dead. While Bosco spends time with family Yokas, Ty and Sully try to clear him as a murder suspect. Kim takes desperate measures to be with Joey.
Kim and Jimmy are having a custody battle over Joey. Boscoe and Faith are on a call of a possible terrorist threat, that ends up being an explosive event. Alex risk her self to save a little girl and is punished by doc for it.
Doc is up for paramedic of the year and is being followed by a film crew. Doc may have made a medical mistake when treating a patient. Faith recovering from cancer treatment and on the job fails to back up Boscoe while chasing a suspect.
After seeing his young son, Joey (recurring guest star KRISTOPHER SCOTT FIEDEL), fall and break his arm in a playground accident, Doherty fights through a burning apartment building to save a frightened boy of Joey's age. Meanwhile, a guilt-ridden Doc can't stay away from a recuperating teenager, Ryan Buckley (recurring guest star GEOFF WIGDOR), who was accidentally paralyzed while under Doc's care. Taylor is annoyed by a new probationary firefighter, Ken Prescott (recurring guest star JASON CERBONE - "The Sopranos"). Bosco and Yokas search for a drug addict, Larry (ERIK JENSEN), who murdered his girlfriend.
Bosco tries to protect an old ESU sharp shooter from spiraling out of control. Faith contemplates taking the sergeant's exam. Davis and Taylor have a steamy affair. Doc feels the guilt over a mistake that made a boy a paraplegic.
It is the anniversary of Bobby's death. Kim finds a girl beaten on the street, whose friends don't want her to help. The investigation into the shooting gets underway, and Ross's shooter is identified. A baby is left at the fire house.
Fred reluctantly goes to the doctor for a physical. The power goes out while he and Faith are leaving the doctor's office, and they're left stuck in an elevator. Everyone else is dealing with the pressures of the city with no electricity.
Bosco is at a supermarket with his mother when it bursts into flames. He and Faith go in search of the arsonist. Doc has another try at romance. Ty is assigned to drive the Chief, who he saved during the riots.
Emily asks questions about Faith's work. Doc has a new recruit with him for the day. Sully and Ty are involved with a building site where union members are picketing scab workers. Carlos is accused of molestation.
Carlos is bailed, but finds little support at the house. Jimmy finds his face on someone else's body in a poster. Ty confronts Sully about his drinking. Faith runs into a college friend who appears to be being abused by her wife.
Emily is lying unconscious in the hospital. Cruz and Bosco go on the hunt for drug suppliers after they find Cruz's sister in the ER with an overdose. Kim is putting off making her statement about Carlos.
Doc faces up to disobeying orders, and a decision is made about Carlos. A car crashes into a shop, driven by a man who abducted his daughter the week before - but things are not completely as they seem and the situation deteriorates. Sully tries to quit drinking.
Anti-crime are involved in a chase that leads to an accident and there is an explosion while the fire and paramedic crews are working. Doc and Kim are on the promotions list. The ADA reviews the case against Stevie, but Bosco doesn't want an innocent man convicted. Faith is on the desk while she looks for a new partner.
Lt Johnson's burns are very bad, and he is transferred to another hospital by helicopter, with Doc and Mrs Johnson at his side. Kim finds out that Aaron is dead. Faith goes to surgery for her wounds. Bosco tells Swersky what happened, and then talks to the FBI.
Sully and Ty are still studying for their law entrance exam. Doc is back, and takes charge. Barnes wants a plea-bargain and gives up Buford. Kiely is seriously ill, and Carlos is tested to see if he's a match for donation.
The investigation into Doc's actions starts. Rose invites Bosco to dinner, unbeknown to him with his brother. Fred is upset that Faith is partnering with Bosco again. A dead body is found, near signs that a drug war is starting. Cruz is miffed at being left out of a raid.
Questions are asked about why Cruz and Dade were watching Bosco's brother. Autopsy reveals that Dade was poisoned by Teflon on the bullets. Bosco searches for Mikey. Mikey says he was the driver, but not the shooter.
Bosco's father engages an expensive lawyer for Mikey. Kim gets caught up in a rave where anti-crime and the drug squad are making a raid, and a fire is started. Cruz continues to compete against the drug squad.
Sasha returns to work. Bosco prepares for his brother's court appearance. Sully's breakfast routine is broken when the owner of a restaurant he frequents is killed in a hold-up. Rebecca collapses, and it is found that she has been badly abused. The LSAT results arrive.
Sully and Ty discover a headless body in the trash. A new medic joins the team. Faith sits vigil with Rebecca, and tries to understand how a mother could allow this to happen to a child. Mikey is located.
The shooting at Mann's apartment is investigated, and all involved stood down for three days. Upon their return Faith gets served, and receives a promotion. Cruz has a new boss and gets an anonymous tip about a rat in the house. Ty meets up with some old foes and bungles their arrests. Munroe has a secret.
Ty gets a rookie partner with family connections to IAB. Carlos gets cursed by a patient's psychic. A Chinese bride is shot at her wedding. Faith asks Fred if their kids can attend her promotion ceremony at One Police Plaza. Monroe finds a way to connect with Yokas.
Faith starts duty as a detective, with Jelly filling her in on the details. Sully and Monroe attend a domestic and discover a suicide in the upstairs apartment. Faith takes an interest in the guy's background and finds he may have killed a woman. Sasha and Ty make up, then find a dead body in the garbage by the squad's house.
Miller recognizes the M.O. of the body found dumped by the squad house and works on the case with Yokas. Finney and Buono get talking. Carlos denies there is anything happening with him and Levine. Munroe is working to a deadline. Carlos and Buono are ambushed. The murderer hands himself in - after he has set up another girl to die slowly.
Faith and Fred go to court to fight for custody of the kids. IAB interrupt, taking Faith away with them. A cute new firefighter arrives. Cruz is denied bail and sent to Rykers on remand. Under full immunity, Faith confesses the truth. A potential suicide causes problems. Sully tells Ty something about the history between himself, Ty's father, and C.T. Finney. Bosco wakes up.
Munroe looks into the past. A missing councilman is found by Carlos and Grace in a bloody and dazed state. Fred's girlfriend reports Charlie missing to Faith. Finney Sr gets wind of Ty's investigations into his father's death.
Faith and Jelly investigate the murder of a Muslim school girl and Faith suspects an honor killing. Ty continues to ask questions about his father. Munroe's secret is revealed. Brendan is a hero and gets a second chance with Grace. Emily makes a choice.
Ty reveals Munroe's secret to the squad. When Munroe and Finney Jr are attacked, there is little response to their 10-13 call. Faith investigates the murder of a retired IAB detective. The fire crew have a has-been actor on a ride-along to study for a part.
Holly says "the L word" to Carlos and he doesn't know how to respond. Bosco is looking forward to his release from hospital. A simple notification turns out to be anything but for Cruz when there might be a terrorist with a dirty bomb. Brendan is worried for his father when CT says he loves him.
The police squad house is evacuated to the fire house across the road. Carlos says the wrong thing to Holly and she leaves. Bosco is discharged from hospital. Grace comforts Brendan. Cruz makes a breakthrough on the dirty bomb case. The tests for radiation poisoning show up something that she already knows.
Sully responds to a robbery, and an exchange of gunfire, at a friends jewellry store. Carlos is exposed to a mysterious illness. Maddox is shot dead in the precinct when Cruz and Santiago are taking him to central booking. Bosco is cleared to return to duty. This episode is Part 1 of a crossover with Medical Investigation that concludes on "Half Life". Neal McDonough and Kelli Williams guest star as their respective Medical Investigation characters - Stephen Connor and Natalie Durant.
Bosco teams with Munroe for the day and they deal with a woman demanding her missing welfare check. Ty and Brendan get into a stake-out and discover a prostitute working out of a hot dog truck. Cruz finds she is not alone.
Carlos buys a ring. A young man's parents are shot and Finney and Davis are left for dead in their upturned car. Emily is invited to the vampire club and rejects them. Grace is disturbed by her feelings towards Finney when he is injured.
Emily inadvertently lets the vampires into the apartment. Cruz and Santiago are targets of a drive-by shooter. Yokas handles a hostage crisis at a TV station. Bosco proves his shooting ability. Carlos has trouble saying what he wants to say to Holly, and gets some sage advice from Stu. A grenade is thrown into the police house.
The police house is under grenade and gun attack by Marcel Hollis's crew, and he escapes from custody. The building is evacuated, with Munroe and Cruz inadvertently left behind upstairs, trapped by rubble and fire.