Discover
William Powell
Philo Vance
Florence Eldridge
Sibella Greene
Ullrich Haupt
Dr. Von Blon
Jean Arthur
Ada Greene
Eugene Pallette
Sergeant Heath
E.H. Calvert
John F. X. Markham
Gertrude Norman
Mrs. Tobias Greene
Lowell Drew
Chester Greene
Morgan Farley
Rex Greene
Brandon Hurst
Sproot
Augusta Burmeister
Mrs. Mannheim
Marcia Harris
Hemming
Veda Buckland
Nurse (uncredited)
Shep Camp
Medical Examiner (uncredited)
Charles E. Evans
Lawyer Canon (uncredited)
Helena Phillips Evans
Miss O'Brien (uncredited)
Mildred Golden
Barton (uncredited)
Harry Strang
Policeman (uncredited)
Camera
Henry W. Gerrard
Director of Photography
Costume & Make-Up
Travis Banton
Costume Design
Directing
Frank Tuttle
Director
Editing
Verna Willis
Editor
Sound
Karl Hajos
Original Music Composer
Writing
S.S. Van Dine
Novel
Louise Long
Screenplay
Bartlett Cormack
Dialogue
Bartlett Cormack
Adaptation
Camera
Henry W. Gerrard
Director of Photography
Costume & Make-Up
Travis Banton
Costume Design
Directing
Frank Tuttle
Director
Editing
Verna Willis
Editor
Sound
Karl Hajos
Original Music Composer
Writing
S.S. Van Dine
Novel
Louise Long
Screenplay
Bartlett Cormack
Dialogue
Bartlett Cormack
Adaptation