The Crab with the Golden Claws: Part 1 - S1-E1
Continuity mistake: Tintin is back at his apartment reading the wrapper from the Crabe Extra tin with "Karaboudjan" written on it. Just before he says "Yes, there's something definitely written here", he has lifted the wrapper off the table with his thumb placed on the front and his four other fingers placed on the back. In the next shot, the wrapper is now flat on the table and his four fingers are now placed on the front. (00:05:15)