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
Tintin and the Lake of Sharks risks of a diplomatic incident. Two days pass before Tintin finally returns to Calculus' house with the shark-like submarine which Calculus built during the search for "Red Rackham's Treasure". The plan is that Tintin will meet the crooks on the beach, and Haddock will follow him in the sub. At the meeting point, criminals pick Tintin up in a submarine, and they head underwater to the flooded city where their base is situated. The mastermind behind this operation is revealed to be none other than Tintin's nemesis Rastapopoulos, now calling himself "King Shark"/"Mr. Big". Rastapopoulos promises to set Niko and