The Mystery of the 13th Guest

Marie Morgan

Johnny Smith

Police Lt. Burke

Speed Dugan

Harold Morgan (as John Duncan)

Tom Jackson (adult)

District Attorney

Marjory Morgan (adult)

Barksdale

Uncle Adam

Grandfather Morgan

Harold (child)

Marie (child)

Mike - Police Desk Sergeant (uncredited)

Carter (uncredited)

Uncle John (uncredited)

Dr. Sherwood - Plastic Surgeon (uncredited)

Photographer (uncredited)

Joe the Valet (uncredited)

Police Coroner (uncredited)

Uncle Wayne (uncredited)

Cop (uncredited)