"Amateur sleuth Ellery Queen learns the truth about a businessman's two long-lost daughters."
William Gargan
as Ellery Queen
Margaret Lindsay
as Nikki Porter
Charley Grapewin
as Insp. Queen
Ralph Morgan
as Alan Rogers
Kay Linaker
as Margo Rogers
Edward Norris
as Stewart Cole
James Burke
as Sgt. Velie
Addison Richards
as Lester Younger
Charles Judels
as Corday
Andrew Tombes
as Bates
Claire Du Brey
as Housekeeper
Micheline Cheirel
as Marie Dubois
Ben Welden
as Fisherman
Milton Parsons
as Butler
Charles Lane
as Coroner
James P. Hogan
Director
Manfred Lee
Story
Frederic Dannay
Eric Taylor
Screenplay
Gertrude Purcell
Additional Dialogue
