The Crab with the Golden Claws: Part 2 - S1-E2
Continuity mistake: When Haddock jumps onto Tintin, believing that he is a bottle of wine, Tintin's hat thing falls off his head and lands on the sand behind him. After Snowy has hit him on the head with the bone, Tintin says "The heat must be getting to you" and there is no sign of Tintin's hat thing on the sand behind him. Then as Haddock begins to run to the "water", the hat thing is back again. (00:28:35)