Kate's mother, who is not on warm terms with Willie, arrives for a surprise visit that forces the Tanners to lock ALF in the garage for "a few days". The problem is that ALF just can't stand being not allowed to roam around in the house, with all the luxuries found there. So he just has to do something.
ALF and Kate's mom are arguing about TV. Kate's mom thinks ALF's favorite soap opera, Midwest General, is sleaze, and shows him her favorite, One World to Hope For, which ALF thinks is boring. Angered, ALF argues that he could write a better script for the series than the writers are coming up with. So ALF actually writes a script and sends it in. The production company actually films ALF's script that bears not-so-subtle similarities to the situation at the Tanners' house...
Willie catches ALF from eating a box of chocolate that was to be a Valentine's Day present for Kate. This incites Willie to give ALF a lecture on how ALF does not respect private property and needs to adopt a new attitude. Also, Kate's mom is moving out of the Tanners' house. The problem is that her new neighbor, Whizzer, wants to come help Dorothy move her stuff. Which means ALF has to hide from him. Kate likes Whizzer and suggests that they invite him over for a dinner. Dorothy doesn't want that. ALF interjects by claiming to have spoken to Dorothy's dead husband ...
ALF bumps his head and loses his memory. All he knows is that his name is Wayne Schlagel and that he's an insurance agent. The Tanners try to make ALF remember who he really is - cue clips from earlier episodes.
ALF still believes that his name is Wayne Schlagel and that he's an insurance agent. Worse still, he has called the police to the Tanners. The Tanners have only a short while before the police arrive, so they try to make ALF remember who he really is by telling more stories from the past - cue more clips from earlier episodes.
ALF is now into gardening, which means he's turned over the entire Tanner's backyard. Willie has a problem at work: a lost Mexican boy is at his office and Willie is trying to track down his father. When that fails, and Willie's boss couldn't care less about helping the boy, Willie has no option but to bring the boy home.
ALF starts to go through a phase where his erratic behavior and hunger for cats will, in his own words, make him "ALF to the tenth power". He wants Willie to build a cage where he can be locked in until the phase is over. Will the cage be strong enough? Can they keep him locked in when he tries to plot himself out?
Brian has to lie to his friend who wants to come for a sleepover that the Tanner's basement is flooded, because ALF must be kept secret. Willie then tries to explain to Brian that lying is always wrong even though Brian has to keep lying because of ALF. Lying to the Ochmonecks is also tiring Willie, not to mention having to put up with ALF's antics. Kate suggests Willie talk to Larry, a therapist they know. Of course, Willie has to prove that ALF exists and is not his hallucination, which means that Larry and ALF meet.
There's a power blackout, so ALF is passing the time by watching the Tanners' neighbors, the Ochmoneks, who are fighting. By dinner time, the power has come back so the Tanners can have dinner. Then comes another, short blackout. Trevor Ochmonek appears at the Tanners' door, seeking peace and quiet from the angry Raquel. Soon after, Raquel comes to demand that Trevor return home. The Tanners persuade him to do so. Night falls and ALF hears the Ochmoneks continue fighting. Suddenly it becomes silent. Too silent for ALF, who's convinced that something foul has happened ...
Lynn has introduced ALF to rap music, much to Willie's dislike. Willie himself is making the final changes to Brian's song in the school pageant where the kids dress as vegetables. Unfortunately, Brian is suffering from stage fright, which causes him to forget the lyrics. ALF offers to help...
The Tanners are preparing for a garage sale to get some money for house payments. ALF discovers the alluring world of horse racing thanks to Kate's mom who bets on them. When the concept of a bookie is explained to ALF, he gets the bright idea of getting the Tanners some money through betting. When his initial bets yield only profit, the plan seems good... at the time.
When the living room TV breaks down, Willie declares that he won't have it fixed, despite ALF's complaints that he has nothing to do but watch TV. ALF keeps pressuring Willie, who discovers that the TV is still under warranty and he can have it sent to the factory for repairs. Except that the factory is in Libya and Willie would have to pay for shipping... ALF thinks Willie has been conned, so he calls Consumer Ed, the guy who fights for consumers' rights on TV... Brian announces that he needs to come up with a project for the Science Carnival. On his own, Brian ...
ALF thinks he's won in a publisher's sweepstakes, but the actual truth is that he subscribed to "hundreds of magazines" (Willie probably exaggerates here)... The next leaflet ALF gets his hands on *does* promise free gifts, but only if the family comes to listen a sales pitch for vacation homes. The Ochmoneks are going there, so Trevor invites the Tanners to come along. Turns out he is a pilot who flew in the Korean war, so they are able to fly instead of a seven-hour drive. The reluctant Willie eventually warms to the idea, but ALF has to stay home. Or is it that he ...
ALF breaks Kate's precious $1,000 painting and gets confined in the garage. ALF can't handle a single night there and makes a bargain with Kate: unless he can behave 7 days in the house, ALF has to move into the garage permanently.
ALF has taken a liking to watching Gilligan's Island (1964). He dresses accordingly and has coconut drinks. He's bored at the Tanners' house and takes things one step too far towards Gilligan's Island (1964).
In one of those moments, when ALF lets his mind wander, he unintentionally walks into Mrs. Ochmonek's sight and greets her. Cue Mrs. Ochmonek panicking and deciding to warn the neighborhood about the "space creature".
Lynn is researching the Tanner Family Tree for a school project. Kate suggests ALF do the the Shumway Family Tree, hoping it will occupy him for some time. However, digging the past may not be a good thing.
The Tanners get the chance to participate in a new TV ratings system. With clever arguments, ALF gets Kate to let him use the system. After learning his favorite programs might get canceled, ALF decides to tweak the numbers a bit.
Halloween is approaching and ALF wants to go trick-or-treating. Kate, of course, objects, but ALF persists. He argues that he has a natural costume and tries offering Willie a deal he can't refuse... Lynn presents Lizard to his parents.
ALF learns the concept of Earthly beauty pageant. Since Lynn, having been dumped, is suffering from low self-esteem, ALF enters her in Miss Southland pageant to prove she is pretty and uses the prizes to lure Lynn to participate.
Kate's mother has decided to get married in the Tanners' house. Unfortunately, ALF develops a Melmacian Hiccup, that keeps getting louder and louder, threatening to draw everyone's attention within a 100 meters (give or take).
ALF reminisces his "adventures" on Melmac. Willie reveals that when he was 17, he hopped on trains and crossed the whole country. ALF gets excited about the idea and talks Willie into taking him to the rail yard.
Willie and Kate no longer share activities, because one of them has to always stay at home keeping eye on ALF. ALF concludes that they are about to break up and in order to prevent that, decides to add romance to their life.
ALF is frustrated because he can't vote in the presidential election. He watches a televised debate with Kate and offers his "better" ideas on how to solve the world's problems. This gives Kate some weird nightmares.