Ellery Queen
William Gargan
Nikki Porter
Margaret Lindsay
George Belden
Noel Madison
Riley
Johnny Arthur
Freddy Froelich
Byron Foulger
Desk Clerk at Florence Garden Apartments
Marie Blake
Fingers Muldoon
Syd Saylor
Waiter at Golden Dragon
Willie Fung
Raymond Radcliffe
Arthur Q. Bryan
Norman Hadley
John Litel
Insp. Queen
Charley Grapewin
Sgt. Velie
James Burke
Capt. H.T. Daley
Frank M. Thomas
Adele Belden
Lilian Bond
Ray Stafford
Morgan Conway
Tommy Gould
Jack La Rue
Irene Hadley
Charlotte Wynters
Director
James P. Hogan
Writer
Frederic Dannay
Manfred Lee
Eric Taylor
Director of Photography
James S. Brown Jr.