Tommy is the third of the family to have a nightmare but luckily doesn't take the pills Dick and Sally are on. When Dick and Sally are sober again they're informed they are all going back to the home planet for emergency maintenance. Dick however doesn't want to go back because he wants to stay with Mary.

Dick experiences his first nightmare and the Solomons think he's gone mad. A psychologist gives him pills that make him mellow. Later Sally also has a nightmare and also ends up high on pills. Tommy and Harry desperately try to contact the Big Giant Head so they can go back to their home planet for emergency maintenance.

A shy and brainy librarian is attracted to Dick, while Sally realizes why she's attracted to Officer Don. Meanwhile, Tommy and Harry write a "killer" episode of The X-Files.

Sally becomes a pseudo celebrity when she beats up Mark Hamill in a restaurant, and Dick becomes jealous while Tommy's school life is affected by Sally's newfound fame. As Sally's assistant, Harry becomes obsessed with keeping Sally on top.

Nina refuses to work as Dick's assistant anymore so he brings in Harry; Sally experiences her first tea party with a little girl then takes up ballet.

After Dick insults his students, he has to go through sensitivity training; Harry goes to Mrs. Dubcek's daughters high school reunion. Officer Don helps Tommy with his driving.

Mary wants to join a high society club and drags Dick along for the ride; Tommy starts hanging out with some high school toughs.

Asserting his manhood, Dick joins Harry at a strip joint; Sally and Tommy duel in a long running Monopoly battle.

After accidentally hitting a chipmunk, Dick becomes an animal rights activist; Tommy gets in trouble with August again; Harry joins the Boy Scouts.

Dick becomes afraid that his romance with Dr. Albright is growing stale; Tommy gets tired of his girlfriend August being perfect at everything she does; Sally and Harry switch jobs at home.

A Frenchman asks an unwitting Sally to marry him so that he can remain in the country. Tommy discovers he has a talent for flower arranging and styling. Dick is inspired to discuss marriage with Albright.

While helping Mary, Dick falls and sprains his ankle. Mary feels responsible and Dick takes advantage of Mary and the rest of the family. Tommy has to sell candy bars for his physical education class and Harry builds a tree house.

Dick directs Romeo & Juliet at Tommy's school and drives everyone crazy; Dick talks Sally into having Officer Don try to fix Mary's traffic tickets.

Dick, upset that Mary got a prime parking space and he didn't, quits his job. Harry loses his memory and becomes paranoid thinking aliens are taking over the world.

The Solomon's experience their first Christmas on Earth. Harry and Sally discover the true meaning of Christmas at the mall, where they get jobs. But Dick turns curmudgeonly. Tommy tries to find the perfect present for August.

Dick gets upset after he discovers that Mary has asked another professor to emcee the fund raiser she is organizing and decides that he is funny enough to be the Master of Ceremonies. Meanwhile, Harry loses his beloved coat, and Sally builds a shelf to hold her shoes.

Thanksgiving is an alien concept for the Solomons; it's an annoyance for Sally (who must cook), and an onus on Tommy. But Harry finds romance.

Mrs. Dubcek wants the Solomon's to babysit her grandson for a bit and things get out of hand when Sally becomes obsessed. Meanwhile, Mary makes the mistake of asking Dick to babysit her fish.

Sally meet a guy at a gay bar and falls for him; Tommy is accepted into a school for geniuses.

Dick can't understand the big deal about Homecoming then he discovers the meaning of school spirit; Sally decides that she needs a best girlfriend.

Harry runs for the city council while Mary and Dick have conflicts about how and why to vote for a candidate.

Mary has problems with the relationship with Dick being out in the open; Sally decides that she wants to be a cop.

The Solomon's tell Sally she needs to get intimate with her boyfriend Mr. Randall. Romantic woes between Sally and Randell don't deter Harry from signing up with a dating service. August tests Tommy's loyalty.

After seeing a scifi horror film that scares him, Dick decides to tell Mary that he is an alien while they are at a sci-fi convention. Harry, Sally and Tommy discover hotel amenities.

Evil Dick plans to take over the world and the Solomons try to stop him. Meanwhile, Evil Dick picks up where Dick left off with Dr. Albright.

Evil Dick puts suave moves on Dr. Albright and her assistant while changing everything at the Solomon home. A new message comes in from the Big Giant Head which Evil Dick keeps secret. Later Harry makes a discovery in the basement.