A group of scientists travel to a remote island to study the effects of nuclear weapons tests, only to get stranded when their airplane mysteriously explodes. The team soon discovers that the tests have given rise to crabs mutated into intelligent, impervious, telepathic giants intent on increasing their numbers by breeding, then travelling to populated areas to feed, and which do not intend to be stopped by their discoverers.
Richard Garland
Dale Drewer
Pamela Duncan
Dr. Martha 'Marti' Hunter
Russell Johnson
Hank Chapman
Leslie Bradley
Dr. Karl Weigand
Mel Welles
Jules Deveroux
Richard H. Cutting
Dr. James Carson
Beach Dickerson
Seaman Ron Fellows
Tony Miller
Seaman Jack Sommers
