When a decaying Russian satellite crashes on the island, the Professor uses a key component for a barometer. With that device, he learns that a massive wave is going to swamp the island. In desperation, the castaways lash their huts together into one structure in order to have any chance to ride the disaster out.
Bob Denver
Alan Hale Jr.
Jim Backus
Natalie Schafer
Judith Baldwin
Russell Johnson
Dawn Wells
Vincent Schiavelli
Art LaFleur
Norman Bartold
Barbara Mallory
June Whitley Taylor
Martin Rudy
Mary Gregory
Glenn Robards
Diana Chesney
Victor Rogers
Michael Flanagan
Martin Ashe
Robert Wood
John Wheeler
Alex Rodine
Don Marshall
Mel Prestidge
Lewis Arquette
Judd Laurance
Michael Macready
Richard Rorke
Marcus K. Mukai
Snag Werris
Micki Waugh
Alisa Powell
Portia Stevens
Candace Bowen
Mario Machado
Stan Rodarte