Nick Burton
Helen Hewitt
Bruce Vander
James Brent
Dr. William 'Bill' Collins
May Thomas
Happy
Ox
Harold Kellogg
Sidney Keats
Professor
Sylvester Odgen 'SOS' Schofield (as Horace MacMahon)
Warden Tom Hammond
Tony Brody
Dr. Harry Lindsay
'Windy' Windsor (as Jack Arnold)
Reporter (uncredited)
Deputy Taking Collins to Prison (uncredited)
Guard Finding Keats' Menu (uncredited)
Mike, a Reporter (uncredited)
Vince Connell (uncredited)
Observer at Train Station (uncredited)
Cockney Convict Heckler (uncredited)
Jerry Connell (uncredited)
Reporter (uncredited)
Dell, Deputy Taking Vander to Prison (uncredited)
Prison Library Clerk (uncredited)
Guard (uncredited)
Marie Brody (uncredited)
Convict (uncredited)
Guard in Yard (uncredited)
Convict Taunting New Prisoners (uncredited)
Visitor's Room Guard (uncredited)
Reporter (uncredited)
Convict Chef Dominick (uncredited)
Train Conductor (uncredited)
Frank, Prison Guard (uncredited)
Red Vernon (uncredited)
Deputy Taking Keats & Kellogg to Prison (uncredited)
Mess Hall Guard (uncredited)
Convict (uncredited)
Jock, Vander's Nephew (uncredited)
Guard (uncredited)
Max, Convict (uncredited)
Wife of SOS (uncredited)
R.J. Reynolds, Sunday Editor (uncredited)