The Tanner family's lives are changed forever when the last survivor from the planet Melmac crashes into their garage. The survivor, Gordon Shumway, is nicknamed ALF by the family (Alien Life Form) and they agree to take him in and hide him from the Alien Task Force.
ALF tries to scare a nervous Mrs. Ochmonek when she comes to babysit Brian.
When Lucky disappears, the Tanners assume ALF ate him.
ALF talks to the president about nuclear weapons and ends up getting Willie arrested.
ALF decides to embark on a new career as a Terry Faith Cosmetics girl.
ALF makes his first friend outside the Tanner family - Jodi, a lonely blind girl.
ALF takes an imaginary trip to Melmac to see Rhonda, his old girlfriend.
ALF thinks he has a crush on Lynn and makes a music video to impress her.
After turning forty-five, Willie feels he hasn't lived a full life. ALF suggests he go skydiving.
When Lynn wants a Ferrari, but the family cannot afford it. ALF sells parts of his spaceship so he can buy it for her.
Taking ALF on the family camping trip turns out to be a big mistake.
ALF wants a real Christmas tree for his first Christmas on earth. He convinces Willie to travel to the mountains to get one.
ALF must hide in the garage when Kate's mother Dorothy comes for an extended visit.
ALF submits transcripts of Kate and Dorothy's arguments to a soap opera.
ALF tries to set Dorothy up with her new neighbor, Whizzer Deaver.
After a bad fall in the tub, ALF is convinced he is an insurance salesman.
The Tanners try to get ALF to remember that he is really an alien, not an insurance salesman. Unconvinced, ALF calls the police.
Willie meets Luis, a recent immigrant from Mexico, at work and brings him home to meet the family.
Every year, Melmacians go through a twenty-four hour period of strange behavior, regardless of what planet they are currently living on.
Willie feels living with ALF is destroying his mental health. He and ALF go to talk to a psychologist.
ALF thinks he sees someone murder the Ochmoneks.
Brian is crippled with stage fright when he must play a piece of asparagus in the school play. ALF tries to make him less nervous.
ALF begins to gamble in order to help the Tanners' finances, but ends up getting them into more money troubles.
According to ALF, whose Melmacian knowledge of space is far greater than that of earthlings, there are two planets beyond Pluto: Alvin and Dave. Brian gets in trouble at school when he includes Alvin and Dave on his model of the solar system.
ALF tries to kill a cockroach from outer space.
The Tanners and the Ochmoneks go away for the weekend. Not wanting to be left behind, ALF sneaks on the plane.
When ALF gets on Willie and Kate's last nerves, he is forced to live in the garage.
ALF becomes obsessed with "Gilligan's Island" and dreams he visits the castaways.
Mrs. Ochmonek sees ALF. No one believes she has discovered aliens; she begins to fear she is insane and just imagined the entire thing.
ALF discovers his parents were married before he was born, a sin on Melmac, and joins a monastery to make things right.
ALF's favorite polka TV show is about to be canceled. So, when the Tanner's become a TV rating's family, he rigs to box so his show becomes a hit.
ALF is the most popular person at the Tanners' Halloween party.
When Lynn does not think she is pretty, so ALF enrolls her in a beauty pageant to help her gain confidence.
ALF gets a severe case of the hiccups just before the Tanners host Dorothy and Whizzer's wedding.
ALF convinces Willie to board a freight train and search for adventure.
With the help of Lynn and Brian, ALF tries to recreate Kate and Willie's honeymoon.
Kate has a dream that she and ALF are rival presidential candidates.
The Tanners get into fight with ALF on Christmas Eve. He runs away, is mistaken for a toy, and given to a girl in the hospital.
ALF tries to escape from the hospital, but he feels guilty leaving the sick girl who received him as a present.
The Ochmoneks' nephew, Jake, comes to stay with his aunt and uncle. Jake and ALF become fast friends.
After being accused of a crime he did not commit, ALF insists he has a right to a fair trial.
ALF believes it is all his fault when Willie's uncle dies.
ALF catches a burglar in the act at the Ochmoneks' house.
Willie must save ALF from a SWAT team.
ALF gets into a fight with the Tanners and moves in with his blind friend, Jody.
When the Tanners take in a stray dog, ALF gets jealous.
Willie wonders if it is really wrong to hit children after meeting the father of one of Brian's classmates.
The Tanners try to sell their house, but ALF keeps playing pranks on potential buyers.
ALF buys a ventriloquist's dummy, and the dummy comes to life.
Kate's friend, an alcoholic, thinks ALF is a hallucination from too much tequila.
ALF thinks that if he revealed himself to the world, he would become a celebrity. Willie tries to convince him otherwise.
ALF feels guilty when he discovers the Tanners cannot pay for Lynn to go to college.
ALF goes along with Lynn on a date.
ALF's guardian angel shows what the Tanners would be like if ALF had not crashed into their garage.
Trevor stays with the Tanners after a he has a nasty fight with Raquel.
ALF hosts "The Tonight Show."
ALF hosts "The Tonight Show."
Lynn becomes upset with ALF after she confides some secrets with him which are later revealed.
The Tanners go to Thanksgiving dinner at the Ochmoneks'.
One of the Ochmoneks' relatives sees ALF, and he calls the Alien Task Force.
Kate must go back to work when Willie gets laid off.
Willie dreams he is back in school . . . and ALF is his roommate.
After reading an article in the National Inquisitor, ALF thinks his cousin is living in Barstow.
ALF thinks he made Brian disappear with a mail-order magic kit.
ALF thinks Willie's coworker is hiding from gangsters.
When ALF signs up to go on David Horowitz's consumer advocate show, Willie must take his place.
ALF thinks the Tanners' neighbor is Elvis.
ALF realizes he is allergic to babies.
An extortionist sees ALF and thinks he is an "illegal alien" from across the border.
ALF writes love letters for Jake.
ALF is sure Melmac superstition is responsible for his recent bout of bad luck.
When ALF mixes up the phone messages, Lynn has two dates for a dance.
Desperately wanting a pet of his own, ALF gets an ant farm.
ALF and Jake bring Brian camping to help him get over his fear of the dark.
Jake's kleptomaniac mother comes to visit and steals from the Tanners.
ALF dreams that he and the Tanners are silent-movie stars.
ALF experiences his first earthquake and becomes obsessed with preparing for future ones.
Kate has her baby, a boy named Eric Tanner.
The Tanners let ALF babysit Eric, but the baby disappears.
Disaster strikes when tabloid photographers capture ALF on film. The Tanners must try to get the film back.
When ALF sees a criminal resembling Willie on a crime-stopper TV show, he must try to hide Willie from the police.
ALF discovers the stock market.
ALF sees a psychoanalyst and becomes intrigued. He invites many other psychoanalysts to the Tanner home in order to study them.
When ALF becomes addicted to eating cotton, Willie holds a support group meeting to try to cure him.
When Willie's brother Neal visits, ALF is forced to hide in the garage.
Neal stays with the Tanner's for longer than an outraged ALF expected.
ALF sees kittens for the first time and gets a whole new attitude about cats.
Dorothy and Whizzer get into a fight, and an angry Dorothy runs away. Whizzer meets ALF while searching for her.
Neal lets ALF stay with him after ALF gets into a fight with the Tanners.
ALF gets his first earth cold.
The Tanners throw a Hawaiian Luau. ALF must hide from their guests.
ALF has a new ambition - to be a stand-up comic.
ALF is suspicious when Neal's ex-wife Margaret reconciles with him. ALF goes out of his way to prove his suspicions are correct.
ALF takes the art world by storm when he creates an award winning still life out of food.
ALF attempts to preform a Melamacian religious ceremony on earth.
ALF wonders about his future with the Tanners, who will age quickly compared to him.
ALF sneaks into a retirement home and discovers senior citizens who want nothing more than to be young again.
ALF and Willie discover an old treasure map and follow it to Death Valley in order to find the treasure.
ALF is astounded and morally outraged at the amounts of pollution a local company is producing.
ALF tries to go on a diet, but fails after he discovers he can find free food in the park.
All of the Tanners but ALF are nervous about Lynn moving in with her boyfriend.
ALF announces to the Tanner family he is leaving earth to settle on another planet with Skip and Rhonda. However, the Alien Task Force catches him before he can board their spaceship.