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
The Adventures of Tintin: The Secret of the Unicorn (video game) Allan then knocks Tintin unconscious as well. Tintin wakes up on a ship, the "Karaboudjan", but is freed by Snowy. Realising that Allan has stolen the scroll, Tintin sets out to find him. However, he inadvertently climbs into the cabin of the original captain of the ship, who gives Tintin directions on how to find Allan. Tintin confronts Allan, who reveals that he is in possession of both Tintin's scroll and the second scroll, and that the former captain is a member of the Haddock family, an ancestor of Sir Francis. Tintin manages to get the scrolls from Allan and