The cast credits in the original release are just the same as they appear on IMDb, with Dean Jagger in first position, Robert Mitchum in third position, and Rhonda Fleming uncredited. When the film was retitled and re-released in 1949, Jagger's and Mitchum's positions were reversed, with Mitchum now in first position and Jagger in third position. Uncredited Fleming, who only appears in the final episode aboard the train, is now prominently included among the leading players in the closing credits. This is the version most frequently shown on cable TV on Turner Classic Movies.
The cut between a screaming woman discovering a body and a whistling locomotive is a direct steal from Alfred Hitchcock's Les 39 marches (1935).
The man in the framed photo on a mantle is director William Castle. At another point, "Mr. King" is being paged; the producers are Frank King and Maurice King.
Working title: "Love from a Stranger".
Marta Mitrovich's debut.