Bob's patients observe tradition by planning a surprise party to honor the fourth year of the group's therapy sessions. When an unseen member, a Mr. Gianelli, threatens to turn the party into a disaster, Bob kicks him out of the group. His decision meets with instant group approval until Mr. Gianelli dies under a ton of zucchini.

Bob's therapy group for overweight people has one negative member, saying it is thin people who have the problem against their weight. Bob asks Carol to sit in on the meeting since she used to be heavy. Carol is asked out by a heavy man.