When Harry runs for city councilman, Dick discovers the complexity of the democratic system and struggles to make the right vote.

Dick's delighted (but Tommy isn't) when Tommy's accepted to a school for smart kids. Sally falls for a guy she met in a gay bar. Harry dabbles in magic.

While doing a favor for Dr. Albright, Dick sprains his ankle and discovers the power of guilt. Harry, desiring his own room, moves into a tree house. Tommy uses Sally to sell chocolate for a school fund-raiser.

When an insulted Nina has had enough and quits, Harry becomes secretary to Dick and Dr. Albright. Meanwhile, Sally decides to live out the human childhood she never had.

Dick gets jury duty for the first time and struggles to deliver a guilty verdict for a clearly guilty man. Meanwhile, Sally, much to Officer Don's distress, falls for a cockney 'artist' called Seth, and makes herself over to look and sound just like him. Elsewhere, Harry and Tommy volunteer themselves for Mary's class project - they must communicate without words for five days.

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.

In order to be with Jennifer, Dick breaks up with Mary, who agrees, doubting that he'll find another woman and not knowing that he already has. After a few dates with Jennifer, Dick begins to find her annoying, especially her like of rhyming her words with his. Meanwhile, Sally, Harry and Tommy experiment at home, by first swapping the furniture from the kitchen with that of the lounge, and then moving all of it into one room.

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 Sally, Harry and Tommy are nearly crushed by a chandelier in a restaurant, they feel reborn, as if they are discovering everything for the first time. Dick is jealous, however, and while Sally and Harry volunteer themselves at a homeless shelter, he strives to have a near-death experience so that he might enjoy life like they do - and a faculty trip into the mountains presents itself as the perfect opportunity. Meanwhile, Tommy decides to waste no more time in his life - and asks Alissa to marry him.

Dick is confused when Nina won't let him accompany her to her Black Student Union meeting, believing it to be a Weight Watchers type club; so, in an attempt to understand the concept, he mistakenly takes the Solomons to a racist white power rally. Dick realizes that the rally was a bad idea, and tries to make it up to Nina by firing her, to release her from what he calls her 'servile role' (as he and Mary's assistant), but she informs him that she is happy in her job. Meanwhile, Sally, Harry and Tommy are preparing to take part in a poetry competition and decide to use racism as their subject.

Valentines Day is approaching and Tommy hopes to get a hotel room and lose his virginity to Alissa, however, he is nervous when he discovers that she is sexually experienced and so loses his virginity to Mary's niece Tiffany first. Meanwhile, Dick discovers that Mary is seeing a therapist and, paranoid, he starts seeing her too, in order to find out what Mary has been saying about him. Paranoia fills Sally also, when Don gives her a gift which he teasingly says is from her 'secret admirer', and she mistakenly believes she has a stalker.

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.

Mary's wealthy sister Renata Albright has donated a large sum of money to have an extension built onto Pendelton University, but Mary knows that it is in fact a spiteful gesture designed to quite literally block the sunlight into her office. To retaliate, Dick schemes with Mary that he will woo Renata, win her, and then break her heart. Meanwhile, Sally and Harry are given ten thousand dollars by Renata to convert their house into a teen center.

The Solomons are struggling to take in the news - they have been ordered back home due to Dick's transgression with Liam. Dick's first instinct is to ask Mary to come, so he takes her to the planetarium before breaking the news to her that they are leaving, and asking her if she will join them. Meanwhile, since admitting his fear to Sally, Don has decided to quit the police force and open a muffin store, but Sally is disgusted by this career choice and decides to whip Don into shape - and turn him into a hardy police officer. At home, Harry and Tommy are attempting to organize a farewell party for the aliens, but have no money, so they decide to max out their credit cards and not worry about paying the bill, since they'll be halfway across the galaxy - they even hire Elvis Costello to sing Fly Me to the Moon.