"Famed detective and crime novelist Ellery Queen solves a case involving the suspicious death of a rich man whose inheritors fight over his estate."
Ralph Bellamy
as Ellery Queen
Margaret Lindsay
as Nikki Porter
Charley Grapewin
as Insp. Queen
James Burke
as Sgt. Velle
Michael Whalen
as Dr. James Rogers
Marsha Hunt
as Barbara Braun
Fred Niblo
as John Braun
Charles Lane
as Dr. Prouty
Ann Shoemaker
as Lydia Braun
Marion Martin
as Cornelia
Douglas Fowley
as Rocky Taylor
Morgan Wallace
as Zachary
Byron Foulger
as Amos
Katherine DeMille
as Valerie Norris
Peter Bronte
as Doctor's Assistant (uncredited)
Jack Cheatham
as Desk Sergeant (uncredited)
Arthur Millett
as Elevator Guard (uncredited)
Frank O'Connor
as Ambulance Driver (uncredited)
Lee Phelps
as Flynn (uncredited)
Jack Rice
as Rogers' Assistant (uncredited)
Alan Ladd
as Elevator Passenger (uncredited) (unconfirmed)
Kurt Neumann
Director
Frederic Dannay
Story
Manfred Lee
Eric Taylor
Screenplay
James S. Brown Jr.
Director of Photography