
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.

as Dale Drewer

as Dr. Martha 'Marti' Hunter

as Hank Chapman

as Dr. Karl Weigand

as Jules Deveroux

as Dr. James Carson

as Seaman Ron Fellows

as Seaman Jack Sommers

as Ensign Quinlan

as Seaman Mac, wears sunglasses

as Diving-double for male cast

as Diving-double for Pamela Duncan