Blind Alley

Hal Wilson

Dr. Shelby

Mary

Linda Curtis

George Curtis

Doris Shelby

Dick Holbrook (as John Eldridge)

Agnes

Buck

Fred Landis

Nick

Harriet

State Trooper Stopping Fred (uncredited)

Joe (uncredited)

Trooper with Joe (uncredited)

Trooper Cronin (uncredited)

Warden (uncredited)

Holmes (uncredited)

James Warwick's play opened on Broadway in New York City, New York, USA on 24 September 1935 and closed in January 1936 after 119 performances. The opening night cast included George Coulouris as Dr. Shelby and Roy Hargrave as Hal Wilson. Also in the cast were Jay Adler, Lloyd Barry, Ruth Fallows, Mabel Montgomery, James Truex and Katherine Warren.

This film was re-made as The Dark Past (1948). It starred Lee J. Cobb as the psychiatrist and William Holden as the killer.

The gangster's fingers are supposedly paralyzed, but when he pushes the "Insanity and the Criminal Mind" book back onto the shelf, you can clearly see him flick it into place with one of his "paralyzed" fingers.