Tintin (character) making it in his role of explorer. Clearly unencumbered with financial preoccupations, after "Red Rackham's Treasure" he is ensconced as a permanent house guest in the stately Marlinspike Hall with retired mariner Captain Haddock and the scientist Professor Calculus. Tintin occupies all of his time with his friends, exploring the bottom of the sea, the tops of the mountains, and the surface of the Moon (sixteen years before astronaut Neil Armstrong). Through it all, Tintin finds himself cast in the role of international social crusader, sticking up for the underdog and looking after those less fortunate than himself. From the
Tintin and the Lake of Sharks with laughing gas and take the children away. Tintin and Haddock pursue them but fail to rescue Niko and Nouchka. The criminals leave behind a message on a tape player from their leader, "King Shark", who tells the heroes (with a voice which is startingly familiar to Tintin) that they will get the children back in return for Calculus' invention. Tintin himself is to do the exchange and is not to call the police. Tintin, Haddock, Calculus and the detectives search the house for bugs, and Tintin discovers a secret passage that leads to Madame Black's walkie-talkie hidden in the