Robert Bray as Mike Hammer

Whitney Blake as Nancy Williams

Donald Randolph as Colonel Holloway (as Don Randolph)

Richard Garland as Louis

Fred Essler as Ludwig Teller

Booth Colman as Capt. Pat Chambers (as Booth Coleman)

Pamela Duncan as Velda

Genie Coree as Maria (as Gina Coré)

Patricia Donahue as Dione

Jan Chaney as Red

Terence de Marney as Jean (as Terence De Marney)

Peter Mamakos as La Roche

Claire Carleton as Nightclub Boss

Phil Arnold as Shorty