Tintin and the Picaros: Part 2 - S2-E9
Revealing mistake: When Haddock walks in view of the helicopter pilot, it cuts to an interior shot of the helicopter where the pilot says "What's that? A Picaro by the river?" A couple of shots after this, there is another interior shot of the helicopter where the pilot then says "Caramba. He's disappeared." In both of the two interior shots, it is noticeable that the same footage has been used in both the shots as the exact same land is outside the helicopter is in both of the shots. The only difference in the second shot is that Haddock has been removed. (00:26:20)
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