Gordon Shumway, last known survivor from the planet Melmac, crash-lands his spaceship into the Tanner family's suburban garage. Willie dubs him "ALF", short for Alien Life Form. After convincing a military officer that they are not harboring a space creature, the Tanners decide to take ALF in as a member of the family.

ALF decides to have some fun while a nervous Mrs. Ochmonek baby-sits Brian.

When Lucky the cat disappears, everyone pins the blame on ALF.

ALF calls the president to address his concerns about nuclear weapons.

ALF takes a job selling cosmetics over the phone.

ALF befriends a lonely blind girl.

Willie helps homesick ALF arrange a trip to Melmac.

ALF has a crush on Lynn, so he makes a music video to impress her.

On his 45th birthday, Willie feels unfulfilled, so ALF suggests he go skydiving.

ALF sells parts of his spaceship to buy Lynn a Ferrari.

Willie loses his temper with ALF during a family camping trip.

It's Christmastime. Unfortunately ALF chops the Christmas tree into firewood before anyone notices. The Tanners then have two tasks: to teach ALF all about Christmas and find a new Christmas tree.

ALF heads for the garage when Kate's mother pays a visit.

ALF submits scripts to his favorite soap opera.

ALF plays matchmaker for Kate's mother.

ALF hits his head and is convinced he is an insurance salesman. The Tanners try reviewing past events to try and jog his memory.

The Tanners continue to try and jog ALF's memory, and deal with the police at the same time.

ALF befriends a young Mexican immigrant.

ALF goes through a 24-hour period of bizarre behavior.

Willie and ALF both talk to a psychologist.

ALF thinks he witnessed a murder at a neighbor's house.

ALF comes to Brian's aid when the boy has to play an asparagus in the school play.

ALF develops a gambling habit and winds up in trouble with his bookie.

Brian causes trouble at school when he repeats some of ALF's intergalactic knowledge.

A cockroach from outer space invades the Tanner home.

When Mr. Ochmonek becomes sick during a flight, ALF flies the plane.

ALF is relocated to the family garage as a result of his mischievous behavior.

Mrs. Ochmonek thinks she's gone crazy when she spots ALF in the backyard.

ALF joins a monastery after learning that his parents were married before he was born -- a disgrace on the planet Melmac.

The Tanners become a TV-ratings family and ALF decides to rig the system so that his favorite program becomes a hit.

ALF becomes the star attraction at the Tanners' Halloween party.

ALF helps Lynn boost her self-confidence by enrolling her in a beauty pageant.

ALF gets a severe case of hiccups after being excluded from Dorothy and Whizzer's wedding party.

Willie and ALF hop on board a freight train in search of adventure.

ALF and the Tanner kids give Willie and Kate a second honeymoon.

Kate dreams that she and ALF are rival presidential candidates.

ALF and the Tanners prepare to spend Christmas in a cabin. When the owner comes to visit them, ALF accidently jumps into his trunk and he is taken to a hospital and given away as a Christmas gift to a little girl.

ALF befriends the Ochmoneks' belligerent nephew, Jake.

ALF demands a fair trial after being accused of throwing a football through the Ochmoneks' window.

ALF believes that he scared Willie's uncle to death.

ALF lends a hand with the neighborhood block patrol and ends up confronting a prowler in the Ochmoneks' house.

It's up to Willie to save ALF from the SWAT team surrounding the Ochomonek house, in which ALF had been chasing a prowler.

ALF moves in with his blind friend, Jody, and learns some important lessons about life without sight.

ALF, jealous of the attention a stray dog is getting, gives the pooch to a mean old woman who claims to be the owner.

Willie abandons his belief in pacifism after meeting the hostile father of the bully who's been pushing Brian around.

Willie has problems trying to sell the house because ALF keeps scaring off potential buyers with phony ghosts.

ALF's mail-order ventriloquist's dummy takes on a life of its own, and it takes a visit from a psychiatrist to cure him.

Kate's friend, a known drinker, sees ALF in the kitchen and thinks she's hallucinating.

ALF fantasizes that he reveals his existence to the world and serves as substitute host on David Letterman's show.

ALF takes a job as a paper carrier when he learns that the cost of his upkeep is preventing Lynn from attending her first-choice college.

ALF hides out in the back seat during Lynn's date at the drive-in.

In a fantasy sequence, ALF's guardian angel shows him what the Tanners' lives would be like without him.

The Tanners let Trevor Ochmonek stay at their house after he has a fight with his wife.

ALF hosts "The Tonight Show", with Ed McMahon.

ALF hosts "The Tonight Show", with Ed McMahon.

Betrayed confidences cause a falling-out between ALF and Lynn.

The Tanners are invited to a Thanksgiving dinner with the Ochmonek's bizarre relatives.

ALF must avoid the Alien Task Force when a bum blows the whistle on him.

Kate goes back to work when a strike sends Willie home.

In a nightmare, Willie dreams ALF is his school roommate.

ALF mistakenly believes his cousin is living in Barstow, when he reads an article in the National Inquisitor.

ALF makes Brian disappear with a mail-order magic kit.

ALF is convinced gangsters are chasing the Tanners' houseguest.

ALF's expose earns Willie a guest spot on David Horowitz's consumer advocate show.

ALF is convinced that a reclusive neighbor is actually Elvis Presley.

ALF has an allergic reaction to a baby.

An extortionist threatens to turn ALF in to the immigration authorities for being an ""illegal alien"".

ALF ghostwrites Jake's love letters.

ALF blames his streak of bad luck on a Melmac superstition.

Lynn ends up with two dates for a dance through ALF's mishandled phone message.

Desperate for a pet of his own, ALF acquires an ant farm.

ALF and Jake suggest Brian camp out to overcome his fear of the dark.

ALF sees Jake's kleptomaniac mother arrives for a visit, and steals a broach from Kate.

ALF imagines in black and white that he and the Tanners are silent-movie stars.

ALF prepares for the worst after experiencing a mild earthquake.

ALF prepares for the baby's arrival by re-enacting scenes from "The Dick Van Dyke Show."

ALF earns the right to baby-sit Eric, but almost blows it when the child disappears.

Tabloid photographers accidentally photograph ALF, so the Tanners have to get the film back.

ALF shields Willie when a criminal resembling him is profiled on a crime-stopper TV show, but Trevor turns him in.

Using Willie's home computer, ALF discovers and later becomes addicted to the art of making stock-market deals.

After a visit from a psychologist, ALF subjects the Tanners to a barrage of unwanted psychoanalysis.

Willie, in an effort to curb ALF's cotton addiction, holds a support group meeting in his living room.

ALF, forced to hide, plots the removal of Willie's visiting brother Neal.

ALF gets peeved about having to remain hidden while Willie's brother extends his visit.

ALF's attitude toward cats changes after his first encounter with kittens.

Whizzer comes face-to-face with ALF when he searches for Dorothy at the Tanners.

ALF, on the outs with the Tanners, is offered a place to stay by Neal.

The Tanners pamper ALF after he catches his first Earth cold.

ALF is relegated once again to the attic when the Tanners throw a Hawaiian luau.

ALF dreams he's a famous stand-up comic.

Neal and his ex-wife Margaret reconcile, but ALF goes a long way to prove her motives are less than honest.

ALF enters the art world after he earns praise for a still life made from food.

As a newly ordained Melmacian minister, ALF must officiate a ceremony on Earth.

ALF considers the future with the Tanners, who will age faster than the ageless alien.

ALF encounters youth-seeking senior citizens when he's discovered sneaking into a retirement home.

ALF and Willie scour Death Valley for buried treasure after discovering an old map.

A morally outraged ALF writes nasty letters to a pollution-producing company.

ALF takes to the park in search of food after his diet fails.

ALF is the only one excited by the idea of Lynn moving in with her boyfriend.

It's a sad day in the Tanner household as ALF announces he's leaving Earth to settle on another planet with Skip and Rhonda, but ALF is captured by the Alien Task Force before he can get to their spaceship.