Discover
Richard Crane
Johnny Martin
Faye Marlowe
Sally Cary
Martha Stewart
Ann Cummings
Charles Russell
Miles Carey
Roy Roberts
J.P. Hartley
Harry Morgan
Joe Patillo
Charles Tannen
Harry
Elaine Langan
Peggy-Lou Robinson
Hugh Beaumont
Engineer (uncredited)
Tom Dugan
Watchman (uncredited)
John Hamilton
C.H. Metters (uncredited)
Will Wright
Foreman (uncredited)
Production
Frances C. Richardson
Researcher
Production
Frances C. Richardson
Researcher