The Block Signal

1926· 59 min★ 6.3· Drama, Thriller

Joe Ryan, a veteran train engineer, is demoted to a flagman position after a disastrous crash-- one caused by his cowardly and opportunistic partner. Though Ryan's failing eyesight is named as the cause of the crash, he's undeterred as he designs an automatic braking invention.

Cast: Ralph Lewis, Jean Arthur, Hugh Allan

Director: Frank O'Connor