The Crab with the Golden Claws: Part 2 - S1-E2
Continuity mistake: After Tintin has leapt over from the driver's seat of his speedboat to the driver's seat of Allan's, he begins a fight with him, then they dodge a bridge by ducking. From a wide angle that shows them exiting the bridge, we can see there is nothing on the back of the speedboat. A few seconds later, Allan then punches Tintin and he falls back onto the back, only now some ropes have suddenly appeared. (00:42:30)