The Crab with the Golden Claws: Part 2 - S1-E2
Other mistake: The newspaper article that features Tintin and Captain Haddock at the end of the episode is a flipped shot, as shown by the text that has been reversed. (00:43:35)
The Crab with the Golden Claws: Part 2 - S1-E2
Other mistake: During the recap of Part 1, Tintin says that Allan is smuggling diamonds instead of drugs. (00:02:09)
Chosen answer: It is a pill that makes alcohol taste disgusting.