The Turtles first encounter Shredder in "The Gauntlet", where he dominated them all in combat, and almost kills Leonardo, but the distraction of the newly-mutated Xever and Bradford gave the Turtles the chance to escape.
The Turtles first encounter Shredder in "The Gauntlet" where he dominated them all in combat. Shredder almost kills Leonardo, but the distraction of the newly-mutated Xever and Chris Bradford gave the Turtles the chance to escape.