Continuity mistake: Whilst examining the wrapper with "Karaboudjan" written on it, the "K" is a centimeter away from the letter "A" and all the other letters are about a fifth of a centimeter away from the letters. Tintin then places a magnifying glass above the word "Karaboudjan". After doing this, the "K" that was a centimeter away from the "A" is now a fifth of a centimeter away from the "A", but none of the other letters seem to have changed distances.
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.
Other mistake: During the first shot of Captain Haddock, there is a shot of his table with cards. You can see there are three of the same card (a red ace) on the table. Even if it's one heart and one diamond there's still an extra.
Revealing mistake: When the driver covers the windows in the taxicab, in the shot where he says "Too bad you won't get to appreciate the view", the cover shown between the back seat and the front seat has visibly not been fully drawn in yet, and an unfilled gap can be seen in the cover.
Revealing mistake: When Tintin is writing his news report on the mafia, the writing does not appear when typed, but instead appears one row at a time. Also, when he removes the paper from the typewriter, several rows of writing have suddenly appeared.
Continuity mistake: When Tintin follows the mob member from the diner to the building, the scene cuts to an exterior shot. A hot dog stand is shown outside the building, with a vendor standing beside it, but in the next shot, the vendor is suddenly standing behind it.
Deliberate mistake: The shot of the plane landing in Syldavia at the start of the episode, after the recap of part one, is merely the exact same shot of the plane landing in Syldavia at the start of the previous episode. Note the vehicles on the ground are completely identical and the plane, as well as its movements are also identical.
Revealing mistake: When Calculus is showing Tintin and Haddock around the rocket, they are in the deck below. Tintin and Calculus have already climbed down the ladder and Haddock is still climbing. Whilst Haddock is climbing down, the button on the back of his space suit vanishes for one frame.