Continuity mistake: The escape train stops at a station at which another train has been the site of a massacre. One of the victims of this massacre has his head leaning out of a railway carriage window. As Kenneth More and Lauren Bacall from the escape train walk about the station, he can be seen raising and then lowering his head again as he realises that the 'take' is not complete.
Continuity mistake: When van Leyden re-enters the train, having witnessed the aftermath of the massacre, the sweat marks on the back of his jacket, as seen outside (filmed on location), are noticeably different to inside (filmed in a studio).
