Harry Essex Director, Screenwriter Biff Elliot Mike Hammer Actor Preston Foster Capt. Pat Chambers Actor Peggie Castle Charlotte Manning Actor Margaret Sheridan Velda Actor Alan Reed George Kalecki Actor Frances Osborne Myrna Devlin Actor Robert Cunningham Hal Kines Actor Elisha Cook Jr. Bobo Actor Paul Dubov Marty Actor Mary Anderson Eileen Vickers Actor Tani Guthrie Mary Bellamy Actor Dran Hamilton Esther Bellamy Actor Robert Swanger Jack Williams Actor John Qualen Dr. R.H. Vickers, Veterinarian Actor Mickey Spillane Writer Victor Saville Producer John Alton Cinematographer Franz Waxman Original Music Wiard Ihnen Art Director Edward G. Boyle Set Decoration Betty Pagel Casting