The Adventures of Tintin partially deaf physicist and a regular character alongside Tintin, Snowy, and Captain Haddock. He was introduced in "Red Rackham's Treasure", and based partially on Auguste Piccard, a Swiss physicist. The leading characters do not initially welcome his presence, but through his generous nature and his scientific ability, he develops a lasting bond with them. Eventually, by the end of "Land of Black Gold", he becomes a resident of Marlinspike Hall. Normally mild-mannered and dignified, Calculus occasionally loses his temper and acts in a spectacularly aggressive manner in response to actual or perceived insults, such as when Captain Haddock belittles his
Captain Haddock Captain Haddock as a permanent addition to the cast. Hergé introduced Captain Haddock in "The Crab with the Golden Claws" as the rum-loving captain of the "Karaboudjan", a merchant vessel used— without Haddock's knowledge— by his first mate Allan for smuggling drugs inside crab tins. Because of his alcoholism and temperamental nature, his character was weak and unstable, at times posing as great a hazard to Tintin as the villains of the piece. He was also short-tempered, given to emotional expletive-ridden outbursts, and capable of infuriating behaviour; at one point he even attacks Tintin when, while traversing the Moroccan desert,