There's a wild storm on the Seven-and-a-half seas. Suddenly Violet cries: 'Tornado off the starboard bow!' and a tornado is on its way. Flinn instructs his crew to tie themselves to the ship. But Tom is so fascinated by the tornado that he's too busy recording information to tie himself down, and he gets literally blown off the deck. Luckily he lands on another ship. Unluckily it's those rotten rascally reptiles, the pirate dinosaurs' ship. Tom is knocked out cold, and when he comes too, he's got amnesia. As the other pirate dinosaurs wonder how best to eat him, T Rex gets the idea to tell Tom that he's a dinosaur, a Tom-osaurus, the fiercest dinosaur ever. Tom believes him, and his education begins, beginning with their bitter pirate foes, the dreaded Captain Flinn and the crew of the Acorn. Meanwhile, on the Acorn, Flinn and the others have decided to use one of Tom's own inventions to find him. They find his 'stinkometer' and give it a whiff of one of Tom's T Shirts.
