Revealing: When his body is lying in the baggage car, the "dead" chauffeur's eyelids twitch.

Continuity: In all the interior shots, the overnight express train is fully booked and crowded with people. But in the exterior shots, we're shown a train with all the lights on inside - and not a single person aboard.

Continuity: Solo & Illya are locked in a cell in the windowless baggage car. But all of the exterior shots of the train show it hauling only window-lined passenger cars, and no baggage car at all.

Continuity: The bullet hole in the wall over Solo & Illya's heads disappears after Madame Nemirovitch opens the compartment door.