King Ottokar's Sceptre: Part 1 - S2-E4
Revealing mistake: On the peasant cart, Tintin notices a car. The next shot shows trees to the right of frame literally jiggling. (00:20:25)
King Ottokar's Sceptre: Part 1 - S2-E4
Revealing mistake: Two villains listening to Hector's conversation with Tintin write down notes on his pad. When he writes, it's always the same place he writes every time. (00:02:45)
Revealing mistake: The words on the article are not words. It's just letters mixed up into fake words. (00:08:40)
The Broken Ear: Part 1 - S2-E2
Revealing mistake: When one of the villains throws a knife onto a target board, no knife mark is made afterwards. (00:14:15)
The Broken Ear: Part 1 - S2-E2
Revealing mistake: After losing the parrot, a man is shown writing a "missing parrot" note. After finishing the first line, we can see last word goes over the desk. (00:08:55)
Revealing mistake: When Tintin emerges from his cabin, he starts yawning and stretches his arms. You'll notice that his arms go through the wall as he does this. (00:12:15)
Revealing mistake: When the Peary financier scrunches up a piece of paper after finding out the Aurora failed to be sunk, his cigar is seen going through his lips. (00:12:05)
Revealing mistake: Professor Fossil places the results over a lamp and says "I have never seen such a formation before". As he says this, Tintin appears on screen. He never walks into shot, he just appears on the screen out of nowhere. (00:07:40)
Revealing mistake: During the earthquake, Tintin leaps onto a lamp post and the ground starts to rise. The inside of his mouth is green as this happens. (00:05:50)
Revealing mistake: After Tintin exits the observatory, there is a shot showing us the meteoroid in the sky. In this shot, stars are visible through it. (00:04:40)
The Calculus Affair: Part 1 - S1-E12
Revealing mistake: Tintin says to Professor Topolino it wasn't Calculus who tied him up. The next shot shows a timer on a bomb ticking. As each second ticks, the minute hand on the clock keeps ticking backwards or forwards. (00:17:50)
The Calculus Affair: Part 1 - S1-E12
Revealing mistake: The villain holds a syringe and some liquid comes out of it. It's plainly visible that there is no liquid in it. Syringes are see through - we should have seen the liquid. (00:06:05)
The Calculus Affair: Part 1 - S1-E12
Revealing mistake: The villains stand in front of Marlinspike Hall. The shot after a close-up of their feet shows the clouds along with a storm. Look to the lower left corner and you will see part of the grey cloud doesn't have any color on it, like the animation cell has been scratched. (00:02:50)
The Black Island: Part 2 - S1-E11
Revealing mistake: The mechanic the detectives presume to be a pilot says "This is my first flight". Thomson and Thompson turn their heads to each other whilst the mechanic speaks. Note how they have a black color in their eyes, but when they finish turning their heads, the color in the eyes of the detective on the left disappears for three frames, which reappears as soon as they turn their heads to the ground. (00:31:40)
The Black Island: Part 2 - S1-E11
Revealing mistake: Thomson and Thompson commandeer a plane. When the plane exits the screen in the shot where one of them says "Go up, go up", there are some sort of grey smudge marks on the screen that shouldn't be there. (00:31:25)
The Black Island: Part 1 - S1-E10
Revealing mistake: When Tintin finds the plane, he says "It's definitely the same plane all right". After this shot, it cuts to Snowy and the camera pans over to Tintin. During the rest of this shot, Tintin's left foot is seen going through part of the wreckage. (00:12:00)
The Black Island: Part 1 - S1-E10
Revealing mistake: The nurse said to Tintin that the bullet only grazed his rib. However, when Tintin was shot, there wasn't any bullet hole around his rib area. (00:01:55 - 00:02:25)
The Black Island: Part 1 - S1-E10
Revealing mistake: Tintin notices the plane. The plane isn't visible though the propeller, just the sky. (00:01:25)
The Blue Lotus: Part 2 - S1-E9
Revealing mistake: When Tintin says "Mr. Wang is in danger" to Chang, his skin is blue. (00:36:00)
The Blue Lotus: Part 2 - S1-E9
Revealing mistake: In the shot where loads of people walk beside the train, there is a guy with a huge bag. When he walks into the shot, the bag is white for about two frames. Then the bag becomes white as he walks further into shot. (00:29:55)
Chosen answer: It is a pill that makes alcohol taste disgusting.