Calificación
Reparto

Bela Lugosi
Dr. Alex Zorka

Dorothy Arnold
Jean Drew

Robert Kent
Capt. Bob West

Edwin Stanley
Dr. Fred Mallory

Regis Toomey
Lt. Jim Daley

Jack C. Smith
Monk

Edward Van Sloan
Jarvis

Dora Clement
Ann Zorka

Anthony Averill
Rankin

Hugh Huntley
Perkins

Monte Vandergrift
Jarvis Goon

Frank Mayo
West's Boss

Jim Farley
Harbormaster

Eddie Acuff
Mac

Ed Wolff
The Robot

Roy Barcroft
Parker (uncredited)