Movie trailer for the 1937 film San Quentin starring Pat O'Brien, Humphrey Bogart and Ann Sheridan. It tells the story of ex-Army officer Captain Stephen Jameson (O'Brien) who takes a job as a prison guard. He falls in love with May (Sheridan), who is the sister of inmate Joe 'Red' Kennedy. (Bogart). It was shot on location at San Quentin State Prison.