Vol 7: The Calculus Affair: Strange events at Marlinspike Hall involving a dangerous sonar device and the kidnapping of Professor Calculus sends Tintin, Snowy and Captain Haddock on a dangerous rescue mission. The Red Sea Sharks: Tintin and Captain Haddock travel to Khemed to rescue the Emir from the danger of arms smugglers who have overthrown his government. Tintin in Tibet: Tintin’s friend Chang has been killed in a terrible plane crash and Tintin is distraught: But after a strange dream, Tintin becomes convinced Chang is alive.