Shortly after they first board the train, when Terry (played by Dennis Waterman ) returns to his seat in the dining car, keep an eye on the back of the table. After cutting away to a shot looking down the carriage, when it returns to the table, a wine list has suddenly appeared, there had obviously been a re-take.
When the passengers are queuing for the Orient Express, members of the public can be seen at the platform barriers watching the filming.