Robert Bray
— Mike Hammer
Whitney Blake
— Nancy Williams
Donald Randolph
— Colonel Holloway (as Don Randolph)
Richard Garland
— Louis
Fred Essler
— Ludwig Teller
Booth Colman
— Capt. Pat Chambers (as Booth Coleman)
Pamela Duncan
— Velda
Genie Coree
— Maria (as Gina Coré)
Patricia Donahue
— Dione
Jan Chaney
— Red
Terence de Marney
— Jean (as Terence De Marney)
Peter Mamakos
— La Roche
Claire Carleton
— Nightclub Boss
Phil Arnold
— Shorty