This pivotal episode of the 2003 series marks a turning point as the Turtles finally learn the dark truth about Oroku Saki and his connection to their Master Splinter.

: After Leo returns with the sword, Master Splinter reveals his true history:

, under the name The Shredder , killed Yoshi after he refused to provide information on his enemies.

: Just as the Turtles think the battle is over, Oroku Saki arrives clad in his full Shredder armor , vowing to crush anyone who stands against him.

: Realizing they were manipulated, the Turtles return to face Saki. Leonardo rejects the alliance, returning the sword "turtle style" by throwing it into a turbine.

He learned ninjutsu by mimicking Yoshi's movements from his cage.