Audio problem: When Tintin says "Maybe we should go back inside" his mouth doesn't move. (00:09:20)
King Ottokar's Sceptre: Part 2 - S2-E5
Audio problem: When Tintin says the detectives should question the professor, one of them says "precisely" without moving their mouth. (00:35:10)
Chosen answer: It is a pill that makes alcohol taste disgusting.