The Mystery of the 13th Guest

Helen Parrish

Marie Morgan

Dick Purcell

Johnny Smith

Tim Ryan

Police Lt. Burke

Frank Faylen

Speed Dugan

Johnny Duncan

Harold Morgan (as John Duncan)

John Dawson

Tom Jackson (adult)

Addison Richards

District Attorney

Jacqueline Dalya

Marjory Morgan (adult)

Cyril Ring

Barksdale

Paul McVey

Uncle Adam

Lloyd Ingraham

Grandfather Morgan

Robert J. Anderson

Harold (child)

Shirley Jean Anderson

Marie (child)

Mike Donovan

Mike - Police Desk Sergeant (uncredited)

Lester Dorr

Carter (uncredited)

Dick Gordon

Uncle John (uncredited)

Herbert Heyes

Dr. Sherwood - Plastic Surgeon (uncredited)

Donald Kerr

Photographer (uncredited)

Fred 'Snowflake' Toones

Joe the Valet (uncredited)

Wilbur Mack

Police Coroner (uncredited)

Richard Neill

Uncle Wayne (uncredited)

Dick Rush

Cop (uncredited)