Richard Diamond, Private Detective

Richard Diamond / Chuck Garrett

Sgt. Alden

Lt. Pete Kile / Lieutenant Kile

Lt. Dennis McGough

Paul Manners / Clifton

Harold Jason / Sidney Gordon / Green

Arnie Bullock / Larry

Sally / Claire Toujours

Mindy Parker / Harriet Barnes

Norman Dewitt / Bill Reade

Sgt. Riker

Ted Anthony / Brother Joshua

Willie Gibson / Steve Gorgas

Johnson / George

Edna Shaw / Dr. Tesla

Johnny Prescott (uncredited) / Charlie Kane

Emilio Tomas / Axel

Winifred O'Hara / Laura Renault

Bartender / Joe

Tim Wilson / Frank Bonner

Mickey Farmer / Rudi Trekhala

Joey Kane / Warburton Flagge

Gerald Clayton / Stuart Simons

Joel Finlay / Mike Gower