Paul Naschy as Gotho

Rosanna Yanni as Elke

Víctor Barrera as Dr. Frederick Tauchner

María Elena Arpón as Ilsa

Manuel de Blas as Police Inspector

Antonio Pica as Police Inspector

Kino Pueyo as Hans

Ángel Menéndez as The Commissioner

Sofía Casares as Eva

Antonio Mayans as Medical Student

Adolfo Thous as

Fernando Sotuela as Udo

Alberto Dalbés as Dr. Orla

Maria Perschy as Dr. Maria Meyer

Susan Taff as Nurse

Ingrid Rabel as Victim in Morgue Corridor