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The Block Signal (1926)
Genre: Drama, Thriller
Released: 1926-09-15
Runtime: 59 min.
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.