Joseph Cotten as Baron Frankenstein

Rosalba Neri as Tania Frankenstein

Paul Müller as Dr. Charles Marshall

Herbert Fux as Tom Lynch

Renate Kasché as Julia Black

Mickey Hargitay as Captain Harris

Lorenzo Terzon as Harris' assistant

Andrea Aureli as Jim Turner

Ada Pometti as Sara Willis

Joshua Sinclair as John

Richard Beardley as Simon Burke

Petar Martinovitch as Jack Morgan

Herb Andress as Hunchback

Marino Masé as Thomas Stack (as Peter Whiteman)

Adam Welles as Child

Riccardo Pizzuti as The Creature