Lloyd Bridges
— Philip Graham
Finlay Currie
— Mr. Darius
Maureen Swanson
— Marina
Simone Silva
— Mitzi Molnaur
Ferdy Mayne
— Maxwell Carey
Peter Dyneley
— Tony Roscoe
Roger Delgado
— Detective Gonzales
George Woodbridge
— Inspector Goldfinch
Russell Waters
— Dr. Zeissman
Seymour Green
— Rope-Soles
Patrick Westwood
— Porter
Mary Parker
— Nancy
Jane Asher
— Girl (uncredited)