Philo Vance

Sibella Greene

Ada Greene

Sergeant Ernest Heath

District Attorney John F. X. Markham

Dr. Arthur Von Blon

Mrs. Tobias Greene

Chester Greene

Rex Greene

Sproot

Mrs. Gertrude Mannheim

Hemmings

Nurse (Uncredited)

Medical Examiner (Uncredited)

Lawyer Canon (Uncredited)

Miss O'Brien (Uncredited)

Barton (Uncredited)

Cop in House (Uncredited)