Robert Livingston

Dr. Terrance 'Terry' Evans

Lorna Gray

Nurse Susan Drake

Ian Keith

Ormond Murks

Thomas E. Jackson

Detective Blair

Charles Trowbridge

Dr. Rufus Maynard

Earle Hodgins

Fred Mays (Fred Murks)

Wilton Graff

Dr. Lucifer Garland

LeRoy Mason

Detective Hendricks

William Haade

Police Officer 'Tiny'

Charles Cane

Chief Inspector Ryan

Chuck Hamilton

Officer Joe - The Driver

Wheaton Chambers

Coroner (uncredited)