Philo Vance

Jimmie Spottswoode

The Canary

Alice LaFosse

Charles Spottswoode

John Cleaver

Dr. Ambrose Lindquist

District Attorney Markham (as Captain E. H. Calvert)

Sergeant Heath

Tony Skeel

Louis Mannix

George Y. Harvey (uncredited)

Body Double for Louise Brooks (uncredited)

Stuttering Hallboy (uncredited)