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

Dick's rudeness lands him in a sensitivity-training session. Dubcek's daughter takes Harry to her high-school reunion. Officer Don teaches Tommy how to drive.

The Solomons reflect on their sinful ways in an episode that illustrates their misdeeds in clips from past episodes.

Dick hurts himself playing in a wheelchair, which puts him in one for real; Dubcek's daughter Vicki opts for celibacy, much to Harry's chagrin.

Harry and Vicki prepare for an evening of amour. Then Vicki's jealous ex crashes the party. Meanwhile, Tommy "comes out" as a gourmet chef.

Randy "sells" Harry to a circus, where he achieves popularity as the act "Hargo the Alien". In order to try to find him, Tommy and Vicki visit a psychic, but it turns out that she's actually seen the Hargo act herself and so knows where Harry is. Meanwhile, the loss of Harry means that the aliens' annual status report cannot be sent, so the Big Giant Head punishes Dick for not submitting it by slowly shutting down his brain.

Dick is in a dispute with the Dubceks because Mrs. Dubcek won't fix his sink until he pays the rent, and he won't pay the rent until she fixes his sink. Eventually, Mrs. Dubcek ends up shutting off the Solomons' power, while Vicki invites Harry to move in with them. Sally has other things on her mind; after voicing to Officer Don that she is fed up with living with the other Solomons, he has proposed to her - but she doesn't know if she is ready. Meanwhile, Tommy deliberately lands himself in detention with his dream girl Alissa, so that he has a chance ask her out.

When a meeting is rescheduled without her having been notified, Mary begins to have doubts about the longevity of her position as Dean, and Dick leads her to become paranoid that there is a conspiracy to have her removed from her job. The pair decide to investigate, and end up breaking into Judith's office by night for evidence, only to be caught by the police. Vicki Dubcek decides that the best thing Sally needs to help her get over her break up with Don is a weekend of riverboat gambling on the Cincinnati Queen, a floating casino - where Harry manages to win big, while Sally gets her lips on a Neil Diamond impersonator.

Dick begins to feel that the unit is falling apart when Sally announces her plans to move out, and he tries in vain to clip her wings. That isn't the last of his problems, however, since Harry is considering having a baby with Vicki - despite the possibility that it could turn out to be an alien. Meanwhile, Tommy sees babysitting with Alissa as an opportunity to prove to a dubious Harry that she really is his girlfriend.

Dick realizes that he doesn't know how to use a computer and strives to learn how to use one. When he does it takes over his life and he becomes a recluse. Sally and Tommy decide to do away with their old TV in favor of a newer, better one, but end up becoming addicted, wanting all the latest features. Harry and Vicki, however, are trying to get pregnant, but the medical-science part of it is turning Harry off.

When at an Italian restaurant, Sally meets an Italian-American man and begins dating him. After learning that he is known as Sammy 'The Butcher' Marchetti, she and Tommy assume that he is some kind of mobster, and when he starts giving Tommy errands to run, Tommy is delighted to think that he is an errand boy for the mob. Sally, however, is less than happy. Mary suggests that she and Dick go on a couples retreat so that they can work on their communication skills. Despite her good intentions, everybody, including Harry and Vicki, embraces Dick's openness and criticizes her for pointing the finger.

The Big Giant Head sends a message that he intends to visit Earth, so Dick quickly orders Sally to move back in and Harry to stop attempting to make a baby with Vicki. He then attempts to prepare Mary for his visit by telling her that an 'old college chum' is visiting and that she would be well advised to discuss how much he has learned in bed. Harry tries his best to avoid Vicki, but eventually resorts to telling her that he can't father a child with her right now. When the Big Giant Head arrives on Earth, he is unimpressed with Dick, his leadership skills and his choice of girlfriend, while being impressed with Sally, her style, and her body.

Dick is suffering the humiliation of having been demoted from High Commander to Harry's assistant, performing the most menial jobs, while Sally has been promoted to his old role. Tommy is preparing for his high school prom with Alissa, but when the Big Giant Head insists on coming, things start to slide, especially when Vicki, who missed out on her own high school prom, turns up. After ruining the prom for Tommy and Alissa, the Big Giant Head whisks Vicki off to his bachelor pod in space.

The Solomons are relieved when Vicki's baby turns out to be human, but horrified when she announces her plans to sell her story to the papers. When a reporter comes sniffing around, Sally gives Dick the title of Security Officer and orders him to kill him; however he can't, so she makes him High Commander and herself Security Officer so that she can kill the reporter herself. Dick then reminds Sally that he is now the High Commander, and that there is nothing she can do to reverse it.

Vicki Dubcek returns with her baby Eric Travis, telling of how she has cleaned up her act and become a proper mother. Unfortunately, however, the Big Giant Head decides to return to Earth and claim his son, but upon seeing Vicki with Eric, he falls in love with her and asks Dick to transform her hatred of him into love. Meanwhile, Harry admits that he is still in love with Vicki, but Dick tells him that he cannot have her because the Big Giant Head will punish him; whilst Tommy attempts to help Sally beat her addiction - shoes.

The Big Giant Head and his new wife Vicki Dubcek arrive back on Earth, where the Big Giant Head takes Dick to a jazz club and admits that his marriage is troubled, and that he would like to get to know him better. As his overlord becomes increasingly more clingy, Dick begins to wonder what the reason behind it is. Meanwhile, Sally gets the wrong idea when she hears Alissa giving Tommy advice about his Valedictorian speech, and saying that it is a time to move on, and so, thinking that Tommy is about to get dumped, she finds Alissa and breaks up with her on his behalf. Harry finally asks Janice out on a date and the pair get together after a meal at the gym; however, Vicki is jealous, her old love for Harry stirring admits her troubled marriage.

The Big Giant Head has revealed to Dick that he is his father, and so would like to get to know his girlfriend Mary better; however, Mary gets drunk at the dinner party and reveals that she has slept with over forty men in her lifetime. The Big Giant Head orders Dick to break up with Mary so he decides to run away with her, before Tommy reminds him that Earth children defy their parents all the time. Meanwhile, Vicki invites Harry's new girlfriend Janice to Tommy's graduation, where she attempts to kill her from beneath the bleachers; however, Sally quickly realizes what's going on and rushes to intervene before it is too late. The time comes for Tommy's speech, but he puts aside talking about his achievements to try to convince Alissa to forgive him.