The Sidetracked Sleeper (1917)

Rupert Winslow, traffic superintendent of the railroad that employs Helen as operator at Lone Point, receives a telegram stating that his wife, who is ill, will be on the midnight express. He calls in Summers, a veteran brakeman on the passenger run and instructs him to watch over Mrs. Winslow and to sidetrack her sleeper if she requires medical attention.