Dr. John Fielding

John Merivale

Acting

Ellen Fielding

Didi Sullivan

Acting

Max Gunther

Gérard Herter

Acting

Linda

Daniela Rocca

Acting

Prof. Rodriguez

Vittorio André

Acting

Bob

Daniele Vargas

Acting

Police Inspector

Nerio Bernardi

Acting

Prof. Rodriguez's Assistant

Giacomo Rossi Stuart

Acting

Indian Dancer

Gail Pearl

Acting

Astronomo

Tom Felleghy

Acting

Nieto

Arturo Dominici

Acting

Mexican at police station (uncredited)

Mario Bava

Directing

Narrator (voice)

Renzo Palmer

Acting

Prof. John Fielding (voice)

Leslie Daniels

Acting

Prof. John Fielding (voice)

Renato De Carmine

Acting

Max Gunther (voice)

Stefano Sibaldi

Acting

Prof. Rodriguez (voice)

Michele Malaspina

Acting

Bob (voice)

Rolf Tasna

Acting