Teenage Mutant Ninja Turtles Season 2 Episode 25-26 The Invasion Part 1 & Part 2 >With their home destroyed by Irma, who was revealed to be the Kraang's second-in-command, Kraang Sub-prime, in disguise, and the mutagen greatly perfected, the Turtles, April, and Casey must survive the ongoing assault of the Kraang Invasion, while Leo goes head-to-head with Shredder's men and his army of foot-soldiers. Meanwhile, Splinter and Leatherhead go one-on-one with the Shredder himself.