Philo Vance

Zalia Graem

Nurse Gladys Beeton

Floyd Garden

Sergeant Ernest Heath

Edgar Lowe Hammle

Major Fenwicke-Ralston

Woode Swift

District Attorney Markham

Mrs. Madge Fenwicke-Ralston

Dr. Garden

Mrs. Hammle

Inspector Colby

Dr. Doremus

Sneed, Hammle's Butler (Uncredited)

Messenger (Uncredited)

Vance's Butler (Uncredited)

Mrs. Jepson (Uncredited)

Heath's Assistant (Uncredited)

Man Yelling at Race Track (Uncredited)

Bus Driver (Uncredited)

Waiter at Race Track (Uncredited)

Servant Eating Caviar (Uncredited)

Newsboy (Uncredited)

Woman Running for Bus (Uncredited)

Traffic Cop (Uncredited)

Directing

Writing

Writing

Production

Camera

Sound

Directing

Production

Editing

Art

Sound

Art

Sound

Art

Costume & Make-Up

Sound