Elenco - Ellery Queen's Penthouse Mystery
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