The Crab with the Golden Claws: Part 1 - S1-E1
Plot hole: The torn off part of the Crabe Extra wrapper that Tintin discovers from the drowning victim appears completely fine, despite the fact that in the previous scene, Daws, the drowning victim, had scrunched up the wrapper and put in his pocket and was then thrown into the river, whilst the wrapper was still in his pocket. (00:02:10 - 00:03:40)
The Crab with the Golden Claws: Part 1 - S1-E1
Plot hole: Whilst Allan is searching the decks below for Tintin, a crew member is keeping watch of Captain Haddock in his quarters. Tintin secretly reveals to Haddock that he is hiding underneath his bed, without letting the crew member notice him and Haddock then looks towards him. The crew member was watching Haddock the entire time, so how does he not notice Haddock looking toward Tintin? (00:18:20)
Chosen answer: It is a pill that makes alcohol taste disgusting.