The Secret of the Unicorn: Part 1 - S1-E3
Tintin: He looks exactly like you.
Captain Haddock: Yes, he is good looking.
The Calculus Affair: Part 2 - S1-E13
Character mistake: After reaching the border, Snowy finds an umbrella and Tintin states that it is Calculus's umbrella. It isn't Calculus's umbrella - Calculus's umbrella has a brown handle, and this one has a grey handle. (00:42:25)
The Red Sea Sharks: Part 1 - S3-E1
Trivia: The Emir's hideout is strongly based on the Al-Khazneh temple at Petra. (00:19:25)
Tintin and the Picaros: Part 1 - S2-E8
Question: What did Calculus put in Haddock's soup? (00:13:45)
Chosen answer: It is a pill that makes alcohol taste disgusting.