The Seven Crystal Balls: Part 1 - S3-E3
Continuity mistake: After General Alcazar performs his knife throwing act, Tintin says he knew General Alcazar in South Africa. At this moment, Alcazar is onstage standing on his own, but in the next shot, a stage hand has suddenly appeared onstage beside him. The knife holster has also suddenly reappeared onstage. (00:05:25)