Elizabeth is kidnapped, one of dozens of scientists held prisoner on the island of Felicitos, controlled by special mineral springs that render their victims completely happy and compliant. Dr. Smith is using them to build a rocket to take her away from our troubled planet in search of some better world, and Mark must find a way to counter the brain-washing and free the captives.
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Patrick Duffy
Mark Harris
Belinda Montgomery
Dr. Elizabeth Merrill
Kenneth Tigar
Dr. Miller Simon
Alan Fudge
C.W. Crawford
Darleen Carr
Dr. Mary Smith
Dennis Redfield
Dick Stoneman
Pamela Peters Solow
Jane
Fred Beir
Captain Bracy
Paul Mantee
FBI Agent Fuller
Michael J. London
Cetacean Crewman
Arthur Batanides
Police Detective
Rick Goldman
Security Guard at Dock
Bob Minor
Minion
Ric Drasin
Minion
Frank Martone
Minion
