William Powell
Philo Vance
Acting
Florence Eldridge
Sibella Greene
Acting
Ullrich Haupt
Dr. Von Blon
Acting
Jean Arthur
Ada Greene
Acting
Eugene Pallette
Sergeant Heath
Acting
E.H. Calvert
John F. X. Markham
Acting
Gertrude Norman
Mrs. Tobias Greene
Acting
Lowell Drew
Chester Greene
Acting
Morgan Farley
Rex Greene
Acting
Brandon Hurst
Sproot
Acting
Augusta Burmeister
Mrs. Mannheim
Acting
Marcia Harris
Hemming
Acting
Veda Buckland
Nurse (uncredited)
Acting
Shep Camp
Medical Examiner (uncredited)
Acting
Charles E. Evans
Lawyer Canon (uncredited)
Acting
Helena Phillips Evans
Miss O'Brien (uncredited)
Acting
Mildred Golden
Barton (uncredited)
Acting
Harry Strang
Policeman (uncredited)
Acting