Richard Diamond, Private Detective

David Janssen

Richard Diamond / Chuck Garrett

Richard Devon

Sgt. Alden

Russ Conway

Alec Bruce

Regis Toomey

Lt. Dennis McGough

Peter Leeds

Green

Bartlett Robinson

Otto Carl

Robert Quarry

Arnie Bullock

Peggy Maley

Sally

Michael Fox

Brother Joshua

Patricia Donahue

Bunny

Ross Elliott

Norman Dewitt

Bill Erwin

Sgt. Riker

Richard Reeves

Thug (uncredited)

Herb Vigran

George

Jeanette Nolan

Edna Shaw

William Schallert

Charlie Kane

Nestor Paiva

Emilio Tomas

Hillary Brooke

Laura Renault

Joe Conley

Bartender

Peter Hansen

Tim Wilson

Christopher Dark

Rudi Trekhala

Lawrence Dobkin

Joey Kane

Frank Albertson

Gerald Clayton

Gordon Jones

Joel Finlay

Sandy Kenyon

Lt. Harry Baker

Ellen Corby

Harriet Smith

Jack Elam

Perk Butler

James Hong

Young Man

Gloria Winters

Dixie Moore

Bethel Leslie

Harriet Morrow

John Hoyt

Burnison

Charles Aidman

George Belden

DeForest Kelley

Sheriff

Eleanor Audley

Agnes Wilton

Ross Martin

Tony Gino

Arthur Batanides

Chip Cooper

Barbara Pepper

Clara Chase

Chris Alcaide

First Thug

Vic Perrin

Smith

Osa Massen

Janet Morrisey