Shredder captures Karai to lure Master Splinter into a trap at a train station.

In this episode, Oroku Saki (The Shredder) uses an unstable mutagen formula provided by Baxter Stockman to mutate himself into a massive, heavily armored "Super Shredder" to gain the power needed to destroy the Turtles and Splinter. [S4E20] The Super Shredder

Splinter and Shredder engage in a final, brutal showdown in the underground tunnels, ending on a cliffhanger that leaves their fates uncertain as they fall into an abyss. Where to Watch The episode is available on several streaming platforms: Shredder captures Karai to lure Master Splinter into