The Black Island: Part 1 - S1-E10
Continuity mistake: In the scene where the train stops, Tintin walks out of his cabin and finds a guy running off the train. Tintin runs after the man and opens the train door. He is then pulled back onto a train by a conductor who doesn't have a moustache. In the following shot, the conductor suddenly does have a moustache. (00:04:30)