LitCharts assigns a color and icon to each theme in Murder on the Orient Express, which you can use to track the themes throughout the work.
Justice
National Identity and International Connections
Detective Methods and Inner Lives
Deception and Genre Expectations
Summary
Analysis
Poirot informs Hector MacQueen that his late boss was actually the criminal Cassetti. MacQueen reacts with surprise and anger, exclaiming “The damned skunk!” MacQueen reveals a personal connection the Armstrong case: his father was the district attorney who unsuccessfully prosecuted Cassetti. He even says that he’d have been willing to kill Ratchett himself, had he known, but he admits, “Seems I’m kind of incriminating myself.”
MacQueen’s response to the information that Ratchett was Cassetti diminishes suspicion in several ways. For one, his surprise seems authentic. Secondly, he openly admits that he’s personally connected to the Armstrong case. Finally, he even lets slip that he might have been willing to kill Ratchett. A guilty man might have tried to hide or downplay any of these facts.
Active
Themes
MacQueen recounts his movements and activities on the previous night. He talked for a little bit with Mary Debenham, and then discussed world politics extensively with Colonel Arbuthnot until two in the morning. He generally finds “Britishers” uptight, but he liked the Colonel. MacQueen had left the train at Vincovci, but can’t remember if he barred the door to the platform on the way back in.
MacQueen corroborates the accounts of other witnesses. In the process, he reveals a prejudice against the British, but notes that Colonel Arbuthnot overcame it in his eyes, echoing the breaking down of barriers between the passengers that Poirot had previously observed. Poirot also tries to nail down whether an unknown suspect might have boarded the train, but MacQueen is unsure.