William Gargan

Character: Ellery Queen

Margaret Lindsay

Character: Nikki Porter

John Litel

Character: Norman Hadley

Charley Grapewin

Character: Insp. Queen

James Burke

Character: Sgt. Velie

Frank M. Thomas

Character: Capt. H.T. Daley

Lilian Bond

Character: Adele Belden

Morgan Conway

Character: Ray Stafford

Jack La Rue

Character: Tommy Gould

Charlotte Wynters

Character: Irene Hadley

Noel Madison

Character: George Belden

Johnny Arthur

Character: Riley

Byron Foulger

Character: Freddy Froelich

Marie Blake

Character: Desk Clerk at Florence Garden Apartments

Syd Saylor

Character: Fingers Muldoon

Willie Fung

Character: Waiter at Golden Dragon

Arthur Q. Bryan

Character: Raymond Radcliffe