1 of 5
Whose first-class carriage does Poirot learn he has been moved into when the train stops at Belgrade?

2 of 5
What sound is accompanied by the loud groan that awakens Poirot on his first night in compartment one?

3 of 5
After hearing a thud in Ratchett's apartment, Poirot looks into the hallway and sees a woman wearing ___.

4 of 5
When Poirot rings to ask for water, the conductor informs him that the train has ___.

5 of 5
Who determines the approximate time of Ratchett's murder as between midnight and two o'clock AM?