William Gargan

Ellery Queen

Margaret Lindsay

Nikki Porter

John Litel

Norman Hadley

Charley Grapewin

Insp. Queen

James Burke

Sgt. Velie

Frank M. Thomas

Capt. H.T. Daley

Lilian Bond

Adele Belden

Morgan Conway

Ray Stafford

Jack La Rue

Tommy Gould

Charlotte Wynters

Irene Hadley

Noel Madison

George Belden

Johnny Arthur

Riley

Byron Foulger

Freddy Froelich

Marie Blake

Desk Clerk at Florence Garden Apartments

Syd Saylor

Fingers Muldoon

James P. Hogan