The Castaways hear on the radio that Mary Ann's boyfriend in Kansas is getting married. Mary Ann overhears the others talking about her, and mistakenly believes that she has been poisoned by the mushrooms she recently ate, and has only a short while left to live. A hilarious dream sequence follows, featuring the Professor sounding a lot like Cary Grant.
Elenco: Bob Denver , Alan Hale Jr. , Russell Johnson , Jim Backus , Natalie Schafer , Tina Louise , Dawn Wells .