Mark Stevens in Timetable - A 1956 Film Noir Classic

As a train speeds through the night, a man posing as a physician holds up the baggage-car crew.

Fake doctor, Paul Bruckner (Wesley Addy), leaves the train with his "patient" and the "patient's wife", really Bruckner's wife, Linda (Linda Brucker).

The insurance company investigator, Charlie Norman (Mark Stevens), on the case to work with the railroad's investigator, Joe Armstrong (King Calder).