Calificación
Reparto

Ralph Bellamy
Ellery Queen

Margaret Lindsay
Nikki Porter

Charley Grapewin
Insp. Queen

Anna May Wong
Lois Ling

James Burke
Sgt. Velie

Eduardo Ciannelli
Count Brett (as Edward Ciannelli)

Frank Albertson
Sanders

Ann Doran
Sheila Cobb

Noel Madison
Gordon Cobb

Charles Lane
Doc Prouty

Russell Hicks
Harry Walsh

Tom Dugan
McGrath

Mantan Moreland
Roy

Theodore von Eltz
Jim Ritter