The Heralds have succeeded in resurrecting the Tengu Shredder, and he's now on the move, inflicting his evil on the world around him. The Heralds urge him to destroy Karai, since she has been 'pretending' to be the Shredder. Reluctantly, the Turtles set out to rescue Karai, but she does not want their help.
This episode provides examples of
- Continuity Nod: When the Turtles call back to the Lair The Ancient One accidentally answers the call, grumbling that he can't figure out how to answer the phone. Master Splinter replies "You already did". The same thing happened in the very first episode, "Things Change", except Master Splinter was the one who was confused by the technology, and Leo told him he already answered the phone.
- First Name Basis: The Mayor of New York refers to Karai as "Miss Saki" (The Utrom Shredder's human identity was Oroku Saki), but in Japanese, the family name comes first, and given name comes last, the reverse of most Western naming traditions. This could be justified in that the Mayor just did not know better (he’s American, not Japanese), and Karai doesn’t seem all that concerned with correcting such mistakes.
- Revenge Before Reason: Despite their loyalty to the demon Shredder, the Heralds are obsessed with getting revenge on Karai. They question him why he isn't concerned to punish Karai for using his name, he tells them he's cares more about ruling the world. Though they don't wish to deter their master with his plans, this does not sit well with them. They also fume over the Shredder's lack of action when the Turtles and their allies attack their fortress. It's because he was waiting for them and allowed the Turtles to kill the Heralds.
- The Worf Effect/ Make Way For The New Villains: The Foot are completely decimated by the Tengu Shredder