Seven episodes from the first season of the 2003 Turtles comeback series. 'Notes from the Underground' is a three-part story, in which Don's investigation into some mysterious crystals unearths a Foot Genetics Lab. When the Turtles start vanishing one by one, only Michelangelo is left to find those responsible... In 'The King', Donatello finds a monster in April's basement, which seems to have been created by an artist with magic powers. In the two-parter 'The Shredder Strikes Back', Leo is ambushed by a major Foot attack force while out on a training run. He soon learns that the Turtles' old enemy, Shredder, is back in town. In 'Tales of Leo', the Turtles, Splinter, Casey and April only just manage to escape after an explosion at the antique store. The Turtles try to bring Leonardo, who is badly wounded and only semi-consciousness, round by telling him tales of his early adventures.