Pete wants to break up with Melissa but has a lot of trouble doing it. So, she dumps him. Berg tries to reconcile them but just makes matters worse. Eventually, Pete and Melissa decide to work things out.

Sharon faces an ethical dilemma with her company's latest insecticide. Berg is continuing to participate in drug trials. Pete makes a presentation of his architectural project but Berg thinks he has drunk the latest drug being trialled.

Berg tries to earn money by product testing some talking sneakers. Sharon gets a new boyfriend, Ted who is a lawyer. Naturally, Berg and Pete have to check him out, and they don't approve because he seems too perfect.

Pete is very eager to go to a Celtics game with Sharon and Melissa. Berg is not so keen to go. Despite this, Berg is in the lucky seat that gets him a seat on the bench, which upsets Pete. What can Berg do to make him happy again?

Mrs. Wexler moves out of the apartment block so Sharon and the boys work out a way to vet the new occupant. However, they have very different ideas of who it should be. Melissa moves in to Pete's displeasure, which forces them to break up.

Sharon is dropped from her softball team. This inspires Berg to come up with the idea of starting their own women's team, sponsored by Beacon Street Pizza. Things do not go well when Pete's current infatuation, April, is a disaster.

Pete and Berg pick up two women but Pete is only interested in a long-term relationship after breaking up with Melissa. Berg helps by fixing him up with a patient. But Berg hasn't yet learnt how to read hospital charts properly.

Berg organizes a birthday party for Pete 7 months early so he can impress Bethany. He also tries to act cool but it doesn't work as he finds it difficult to express his true feelings towards her.

Molly puts a personal ad in the paper wanting to meet Pete. He doesn't want to reply so Berg replies on his behalf. The meeting with Molly goes very well so Sharon decides to do the same thing. Molly turns out to be the very jealous type.

Berg delivers a pizza to Isabella, a delivery normally made by Pete. He finds out that she uses her naked body to paint and so wants to date her, in competition with Pete. Sharon tries to attract a jogger that runs past the apartments.

Pete and Berg reminisce with Bill and Mr Bauer about how they first met Sharon. She was collecting signatures for a Greenpeace petition in a bar.

Berg's father, who is a lawyer, comes to town but Berg hasn't told him that he has dropped out of law school. His father also has a secret. Sharon has an unfortunate job at a fair advertising her chemical company, complete with protesters.

Pete installs a satellite dish on the building and his landlord removes it. Pete fights back but all he succeeds in doing is getting the heating in the building turned off, which kills Berg's pet fish. The battle is on and it escalates!