Academic researchers are chased by a nuclear-hot specimen of ancient Mayan blob.
John Merivale
as Dr. John Fielding
Didi Sullivan
as Ellen Fielding
Gérard Herter
as Max Gunther
Daniela Rocca
as Linda
Vittorio André
as Prof. Rodriguez
Daniele Vargas
as Bob
Nerio Bernardi
as Police Inspector
Giacomo Rossi Stuart
as Prof. Rodriguez's Assistant
Gail Pearl
as Indian Dancer
Tom Felleghy
as Astronomo
Arturo Dominici
as Nieto
Mario Bava
as Mexican at police station (uncredited)
