The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: When Tintin, Haddock and Snowy are walking down the street, they stop walking for a moment next to a lamppost. The shadow of the post is first cast across the building next to it. About two shots afterwards, the shadow is suddenly cast on the sidewalk directly in front of it. (00:26:20)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: Thomson shows Tintin that he has had an elastic band attached to the wallet in his pocket as an attempt to catch the pickpocket. When they first use, the wallet with the elastic band is in Thomson's right pocket. In the next scene, when the pickpocket attempts to steal Thomson's wallet, it is now inside his left pocket. (00:30:20)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: Tintin, Haddock, Snowy and the detectives are back at the office after getting the pickpocket's coat and Tintin's wallet. Tintin opens his wallet and takes out the scroll inside it. When he takes out the scroll, the scroll is smooth and undamaged. He then hands the scroll to Haddock and it is suddenly tattered. (00:31:05)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: Tintin is in the courtyard of Marlinspike Hall and convinced he has escaped the Bird brothers. Tintin then gets whacked on the head by the butler with a long stick. In the shot where Tintin gets hit, the stick is very thick. The shot then changes to the butler saying "I got him" and the stick is suddenly much thinner. (00:39:30)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: After Snowy bites the hand of the Bird brother with the gun, Tintin punches both of them and knocks them out. One of the brothers lands with his legs landing on the bottom half of the other brother's right leg. Captain Haddock then appears in scene and now the brother suddenly has his legs placed on the top half of both the other brother's legs. (00:40:10)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: Mr. Silk is showing Thomson and Thompson to the door whilst Tintin exits with the scrolls and Max Bird's diary. When Tintin exits Silk's room whilst saying "Mr. Silk who made the mistake, gentleman", Tintin is holding the scrolls and the wallet and nothing is sticking out of the wallet. Tintin then exits the room handing the wallet to the detectives, and there are suddenly papers sticking out of it. (00:42:45)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: When Haddock throws his hat in the air, there is a lamp post located next to Tintin and it is a light blue colour. A couple of shots later, the lamp post is suddenly a much darker turquoise colour. (00:26:20)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: When Tintin wakes up in the room, a voice tells him to check the intercom. The entire wall surrounding the intercom is blue. Tintin then walks up to the intercom and the surrounding wall is suddenly green. (00:34:50)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: When the voice on the intercom tells Tintin he wants the parchments, the close-up shots of the intercom show two screws visible at each end of it. But in the shots from further away, the two screws are not visible in the intercom. (00:34:55)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: When Tintin wakes up after being hit on the head by the butler, the Bird brothers are shown pointing a gun at him saying "We've wasted enough time." The gun is pointed at his noise in the first shot. The shot then changes and the gun is suddenly being pointed at his cheek. (00:39:55)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: When Tintin discovers Mr. Silk's wallet collection, he finds Max Bird's wallet, located in the middle of one of the shelves, being the red wallet. The red wallet located in the middle was not visible in the previous shot. (00:42:20)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: The block of wood Tintin uses to break down the wall disappears when the Bird brothers run up to the broken down wall. (00:36:25 - 00:37:00)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: When Sakharine wakes up, his door goes from fully open to nearly closed in the shots of Tintin without any time to close the door. (00:29:10)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: When Sakharine wakes up, Tintin runs to him and the detectives trip up. They are next to the door. In the next shot, we can see the door, but none of the detectives. (00:29:10)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: When Captain Haddock approaches Thomson and Thompson, their hair is all messy. About 2 shots later, their hair is neatly combed. (00:28:35)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: Sakharine is lying on the floor when they find him presumably dead. But when Thomson and Thompson run out of the room, Sakharine has disappeared. (00:28:20)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: The mast on the Unicorn model Sakharine has changed color when Tintin and Haddock find it, from beige to grey. (00:27:40)
The Secret of the Unicorn: Part 2 - S1-E4
Continuity mistake: Tintin, Haddock and Snowy are walking down the street and Haddock says he's going to be rich and tosses his hat in the air. There is a lamppost right next to Tintin. A man then opens his window, telling Haddock to keep the noise down and Tintin is suddenly standing about a foot away from the post. (00:26:20)
Chosen answer: It is a pill that makes alcohol taste disgusting.