A Gilligan's Island fantasy plays into the season finale, which finds Dan torn between pleasing Roseanne and building a boat for a future adventure. Dan becomes the Skipper, Leon becomes Mr Howell, Bev becomes Mrs Howell, Jackie becomes Gilligan, Darlene becomes Maryanne, and Roseanne becomes Ginger.

Jim and Cindy leave for Hong Kong. Kelly wants to continue her relationship with Brandon, but he cannot get over the rejected marriage proposal. Steve and Donna head to Palm Springs for an Alpha/KEG convention. A contrite Ray agrees to accompany Donna, who is making a speech at the event. He quickly becomes angry and possessive. Rush tries to set up Steve with a business associate's daughter. Steve is more interested in the Cadillac-driving "goddess" he keeps encountering. Brandon and Valerie decide to head to Palm Springs to avoid the caravan of potential buyers who have overrun the house. Brandon goes on a drinking binge and finds himself tempted by Valerie. He has a hallucination in which his parents appear and express their disappointment. Kelly postpones her trip to the convention to spend the day with Allison, but is very secretive. David and Clare see them together and get the wrong idea. Allison admits her love for Kelly, who is not interested. Dylan's plans to visit his mother and sister are nixed when Charley finds an investor for the movie. Dylan is wary after learning that the man is a mobster. Music: 'Feel So High' by Des'ree, 'Leaving on a Jet Plane' by Peter, Paul & Mary, 'Fish Taco' by Dick Dale.

David tells Brandon about Kelly and Allison, and Brandon humiliates Kelly with his drunken ramblings. Brandon plans to give in to Valerie. The police pull over Brandon and arrest him when a joint is found in Val's car. He is released, but rejects Valerie. He clears the air with Kelly before heading home, and refuses another reconciliation attempt. After learning that Tom Rose knew his father, Dylan tries to contact Christine. Rose traces the call and takes Dylan up in a tram car, where his goons hold him over the edge. He says that he knows the identity of Jack's killer, but the information would cost Dylan his life. Dylan and Brandon end up sharing a bus ride home. Dylan plots to track down and kill his father's murderer. Brandon learns that the house has been sold, and he must move in two weeks. He and Valerie end up making out. Ray becomes physical with Donna during an argument and knocks her down the stairs. She suffers an arm injury, and is unnerved when her mother suddenly gives Ray her approval. Valerie tells Donna that she saw Ray push her, but Donna denies it and lashes out at Val. Steve discovers that his goddess is a man.

A gay city councilman is murdered and the trail leads to a bigoted rival politician and a male prostitute.

A 100% fatal and 100% contagious plague is killing the Markabs. Dr. Franklin tries to find a cure, but is being opposed by the Markabs themselves, who believe the plague only affect the immoral.