John 'Ripley
Broderick Crawford
Kate Martell
Ruth Roman
Matty Pavelich
Claude Akins
Brenda Ralles
Suzanne Alexander
Mrs. Downes
Myra Marsh
Joe Walpo - aka Joe Allen
Joe Bassett
Ben
William Schallert
Lt. Jake Kuppol
Alan Dexter
Boxing Manager
Stafford Repp
Connie Anderson
Martha Hyer
Julie Angelino
Marisa Pavan
Dave Millson
Max Showalter
Zack Stewart
Kenneth Tobey
Vince Angelino
Gene Reynolds
FBI Chief Frank Pace
William Johnstone
Greg Barker
Harlan Warde
Uncle Max - aka Charles Martell
Jay Adler
Novel
Bernard C. Schoenfeld
Screenplay
Gordon Gordon
Mildred Gordon
Director of Photography
Joseph F. Biroc
Editor
Grant Whytock
Original Music Composer
Paul Sawtell
Producer
Edward Small
Director
Arnold Laven