The Crab with the Golden Claws: Part 1 - S1-E1
Continuity mistake: When Tintin throws the plank of wood in the upper window, the planks of wood take up the whole window. In the next shot of the window, the planks of wood are at the bottom of the window. (00:15:30)
The Crab with the Golden Claws: Part 1 - S1-E1
Continuity mistake: When Tintin and Haddock discover the sea plane headed for them, Tintin states it is coming in very fast, to which Haddock replies "Not fast enough for me." As he says this, his arms are shown waving around and that his right arm is raised far above his left arm. In the sudden shot following, Haddock's arms are now completely still and are partially lowered. (00:19:45)
The Crab with the Golden Claws: Part 1 - S1-E1
Continuity mistake: The pilot of the seaplane has a mustache, and goes back to the site of the boat to see if Tintin and Haddock really are dead. When Snowy appears behind him and the pilot says "Where did you come from?", the mustache has vanished completely. Then as Tintin pulls on the pilot's leg, the mustache reappears again. (00:20:35)
Chosen answer: It is a pill that makes alcohol taste disgusting.