Vol 5: Red Rackham's Treasure: with the help of the eccentric Professor Calculus, Tintin, Snowy and Captain Haddock embark on a voyage to recover the sunken treasure of the legendary pirate, Red Rackham, in a shark-proof submarine. The Seven Crystal Balls: Tintin investigates a mysterious sleeping illness that fells seven members of a South American expedition. Prisoners of the Sun: Tintin, Snowy and Haddock travel to Peru in search of Professor Calculus, they cross the hot desert sands chasing his kidnappers.