The Crab with the Golden Claws: Part 1 - S1-E1
Continuity mistake: When Snowy runs back to Tintin after getting the Crabe Extra tin stuck in his nose, Tintin says "That's what you get for sticking your nose where it doesn't belong" and reaches to take the tin off his nose. As Tintin reaches for the tin, the wrapper of the tin itself is a very bright yellow and the words "Crabe Extra" are very large. In the next shot, as Tintin actually takes the tin off his nose, the wrapper of the tin is now a pale yellow and the words "Crabe Extra" are now a lot smaller. (00:03:00)