After undersea explosions near a Caribbean island, prehistoric creatures are unleashed on the unsuspecting population.
Ward Ramsey
as Bart Thompson
Paul Lukather
as Chuck
Kristina Hanson
as Betty Piper
Alan Roberts
as Julio
Fred Engelberg
as Mike Hacker
Wayne C. Treadway
as Dumpy
Luci Blaine
as Chica
Howard Dayton
as Mousey
Jack Younger
as Jasper
James Logan
as T.J. O'Leary
Gregg Martell
as The Neanderthal
