Grant Richards

Philo Vance

Roscoe Karns

Sergeant Heath

Helen Burgess

Ada Greene

Ruth Coleman

Sibella Greene

Elizabeth Patterson

Mrs. Tobias Greene

June Martel

Barton

Ellen Drew

Secretary

Purnell Pratt

John F. X. Markham

Colin Tapley

Chester Greene

James Bush

Rex Greene

Leonard Carey

Lister

Nora Cecil

Harvey Stephens

Ivan F. Simpson

Greta Meyer

Myra Marsh

Barlowe Borland

Gladys Unger

Writer

E.A. Dupont

Director

Frank Partos

Writer

Robert North

Producer

Harry Fischbeck

Director of Photography

S.S. Van Dine

Novel

William LeBaron

Executive Producer

Hans Dreier

Art Direction

A. Earl Hedrick

Art Direction

James Smith

Editor