The Sea Serpent [Serpiente de mar]

Timothy Bottoms

Pedro Fontán

Taryn Power

Margaret

Jared Martin

First Mate Lemaris

Ray Milland

Professor Timothy Wallace

Gérard Tichy

Carole James

Jill

Jack Taylor

Hospital Killer

León Klimovsky

Dr. Moore

Charly Bravo

Víctor Israel

Porto, Night Watchman

Pilar Alcón

Nurse (as Diana Eagle)

José Canalejas

Amando de Ossorio

Director

Amando de Ossorio

Screenplay

Raúl Pérez Cubero

Director of Photography

Manel Santisteban

Original Music Composer

José Antonio Rojo

Editor

José Frade

Producer

Frank Cuttlet

Special Effects

Thomas Urbant

Special Effects

Joseph Vargas

Special Effects

Joseph Cherry

Sound Recordist

Antonio Sáiz Palazón

Camera Operator

Alex Digest

Still Photographer