The Black Island: Part 2 - S1-E11
Audio problem: The first shot after the "previously" shows the burned down club. A further two shots after this shows Snowy growling at Mueller and his partner in crime. His mouth never moves when he does this. A growl like that would require his mouth to open at least a good few inches. (00:25:25)
The Black Island: Part 1 - S1-E10
Audio problem: Tintin is shown tying Mueller and his partner in crime to a tree with a cable. After he finishes saying "This old cable should hold you for now", we can see his mouth move as if he is speaking before he goes onto the next sentence even though he isn't actually saying anything. (00:20:45)
The Black Island: Part 1 - S1-E10
Audio problem: After Mueller's assistant gets knocked out by stepping on a rake, Tintin looks at Mueller and says "That was close". Look at his mouth when he says this. His mouth opens but as he says the line, his mouth doesn't continue to move along with the line. (00:20:40)
The Black Island: Part 1 - S1-E10
Audio problem: Mueller throws a gun at Tintin. It misses him and makes a smashing sound. When he runs out of the room, we can see there was nothing which could have smashed. (00:15:50)
The Black Island: Part 1 - S1-E10
Audio problem: Doctor Mueller takes out a gun and Tintin yells "NO!". His mouth is well out-of-sync when he says it. (00:15:30)
The Black Island: Part 1 - S1-E10
Audio problem: Snowy runs to find something. He barks in one shot without his lips moving. (00:12:05)
The Black Island: Part 1 - S1-E10
Audio problem: When Tintin picks up the villains' gun, he never cocks it, but the sound of the gun cocking is still heard. (00:10:55)
The Black Island: Part 1 - S1-E10
Audio problem: The villains tell Tintin to jump and the scene ends. When the next scene starts, a wave hits the cliff. The first wave's impact isn't heard until way after it actually hits. (00:10:20)
The Black Island: Part 1 - S1-E10
Audio problem: One of the detectives say "We missed" after running into a lamp post without his lips moving. (00:07:35)
The Black Island: Part 1 - S1-E10
Audio problem: As the detectives start to re-chase Tintin, one of them says "You can't outrun the long half of the law". Whoever said it, their mouth didn't move whilst saying "the long half of the law". (00:07:30)
The Black Island: Part 1 - S1-E10
Audio problem: When the detectives realise the bearded man was actually Tintin, they say "Tintin?" Their mouths stop moving half way through the line. (00:07:25)
The Blue Lotus: Part 2 - S1-E9
Audio problem: The detectives say "Oh dear" to Tintin when they hand him the arrest warrant. Both of them are heard saying it, but only one of their mouths moves. (00:32:15)
The Blue Lotus: Part 2 - S1-E9
Audio problem: When Tintin yells "Come on, Snowy!" after noticing Chang in the lake, his mouth opens, but never moves for the rest of the line. (00:30:15)
The Blue Lotus: Part 2 - S1-E9
Audio problem: Tintin wakes up and says "Huh?" His lips never move as he says it. His mouth does open but then closes just as he begins to speak. (00:25:20)
The Blue Lotus: Part 1 - S1-E8
Audio problem: Tintin says "The poison has taken effect" when the Chinese man goes crazy after being shot with the dart. When he gets to "effect", his teeth are clenched and his lips never move. (00:03:00)
The Blue Lotus: Part 1 - S1-E8
Audio problem: In the first shot of Mitsumirato, he says "Sit down, Mr. Tintin". His teeth are clenched and his lips never move any time in the sentence. (00:04:50)
The Crab with the Golden Claws: Part 2 - S1-E2
Audio problem: Snowy's barks without his mouth moving in the shot where Tintin jumps onto the docks. (00:41:35)
Cigars of the Pharaoh: Part 2 - S1-E7
Audio problem: When the doctor yells out "Stop him", his mouth is out-of-sync when he says it. This happens after he bumps into the medical orderly. (00:34:40)
Cigars of the Pharaoh: Part 2 - S1-E7
Audio problem: When Tintin says "Do you think you'll be able to cure him" whilst walking through the corridor of the mental hospital with the doctor, his mouth never moves when he says it. (00:33:30)
Cigars of the Pharaoh: Part 1 - S1-E6
Audio problem: When Tintin is filing the bar in the jail cell, he finishes filing the bar soon enough. A second and a half after finishing filing, a filing sound is heard even though he just finished. (00:18:20)
Chosen answer: It is a pill that makes alcohol taste disgusting.