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.
| Actor | Role |
|---|---|
 Ralph Lewis'Jovial Joe' Ryan | 'Jovial Joe' Ryan |
 Jean ArthurGrace Ryan | Grace Ryan |
 Hugh AllanJack Milford | Jack Milford |
 George ChesebroBert Steele | Bert Steele |
 Sidney Franklin'Roadhouse' Rosen | 'Roadhouse' Rosen |
| LLeon Holmes'Unhandy' Andy | 'Unhandy' Andy |
| MMissouri RoyerJim Brennan | Jim Brennan |