Explorers on the Moon: Part 1 - S3-E11
Plot hole: Where did Thomson and Thompson get the pyjamas from? Tintin, Haddock, Calculus and Wolff did not bring any pyjamas aboard the shuttle with them because they were planning on sleeping in their clothes and Thomson and Thompson were only on the rocket because they were inspecting it before take-off, so they wouldn't have brought anything with them. (00:16:30)
Explorers on the Moon: Part 1 - S3-E11
Other mistake: Wolff is explaining that if the motor is shut off again, the magnetic sole boots they are wearing will stop them from floating. Whilst he is explaining this, he is placing the boot straps over the Velcro. The first strap he places is only partially on, but a few frames after, a blip occurs in the animation, and the strap is suddenly entirely over the Velcro. The same happens with the second strap as well. (00:08:00)
Explorers on the Moon: Part 1 - S3-E11
Continuity mistake: When the crates are being lowered onto the moon, the antenna on Tintin's space suit is missing. (00:20:35)
Explorers on the Moon: Part 1 - S3-E11
Other mistake: Haddock is lowering crates onto the moon and looks over to see Thomson and Thompson, whilst they are heard playing around off-screen. In this shot, Haddock's antenna cannot be seen through his helmet, even though the helmet should be transparent. (00:20:40)
Explorers on the Moon: Part 1 - S3-E11
Audio problem: Captain Haddock's mouth doesn't move when he says "Relax? Relax?!" just after Calculus says they have to start the calculations.
Chosen answer: It is a pill that makes alcohol taste disgusting.