The Broken Ear: Part 2 - S2-E3
Other mistake: In a flashback of Lopez stealing the gem stone, he places the idol in his bag and closes it. If you watch the idol as it closes, an animation error occurs where it vanishes from shot just before the bag finishes closing, revealing that the animators forgot to draw it in each individual frame. (00:39:10)
The Broken Ear: Part 2 - S2-E3
Other mistake: The chess pieces Tintin and General Alcazar use during their game are all white. There are never any black pieces at all. (00:29:15)
Chosen answer: If Hector was seriously intent on removing King Ottokar's scepter from the glass cage holding it and launching it through the window with the camera, then Hector would have been forced to knock out the two guards so they would not have interfered with Hector's plan as soon as he removed the scepter from the glass. As for Hector, himself, was explained when Tintin was explaining how Hector stole the scepter. Tintin placed a twig inside the camera and it launched out of the camera. Hector would have placed the scepter inside of the camera, and would have been knocked unconscious due to the spring effect created when the scepter had been launched.
Casual Person