Dupond et Dupont
Tintin and his dog Snowy visit their friends Captain Haddock and Professor Calculus at Marlinspike Hall. There, they learn that Bianca Castafiore, her maid Irma, pianist Igor Wagner and the detectives Thomson and Thompson have been imprisoned in San Theodoros for allegedly attempting to overthrow the military government of General Tapioca. Tapioca's government have further alleged that the plot was masterminded by Tintin, Haddock, and Calculus themselves.