<human>:  How many people were on the train in the movie, ‘Murder on the Orient Express’?
<bot>: That’s a tricky one. There were about 30 people on the train, but there were also a lot of extras. The movie Murder on the Orient Express is based on the Agatha Christie novel of the same name, which is about a murder on a train. The book was published in 1934, so the movie was made in 1974.