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

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

A cockroach from outer space invades the Tanner home.

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

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

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

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

Willie and ALF both talk to a psychologist.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.