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 Blue Oranges tails as a distraction, Tintin & Haddock find a radio identical to Fernando's in Esposito's room, proving his involvement. Haddock's decision to drink Esposito's whisky accidentally leads them to discover Zalamea's secret documents, and his own suspicions about the identity of his enemies. Back at the villains' hideout, the Professors manage to make a broadcast describing their whereabouts. Esposito hears the broadcast and races off to inform his boss. Luckily, Tintin & Haddock also hear the broadcast and set off in hot pursuit. After a brief struggle, Esposito is overcome but the Professors are nowhere to be found—kidnapped again! The