[s1e21] Return To New York: Part 1 -

Using the Battle Shell as a remote-controlled decoy to draw Foot Clan forces to the lower levels, the Turtles sneak into the building through the sewage system.

As the team reaches a higher floor, they discover a filled with large tanks containing liquid and bizarre organisms. The episode ends on a cliffhanger as an alarm sounds and three monstrous, mutated Shredder clones emerge from the tanks to confront them. Episode Details Series: Teenage Mutant Ninja Turtles (2003) Air Date: September 27, 2003 Available on: Paramount+ and IMDb Return to New York, Part 1 (2003 TV series episode) [S1E21] Return to New York: Part 1

After initially being overwhelmed by the invisible attackers, the Turtles adapt. They use fire extinguishers to coat the area in dust, revealing the ninjas' silhouettes, and Donatello uses electro-magnetic shurikens to short-circuit their cloaking devices. Key Reveal & Cliffhanger Using the Battle Shell as a remote-controlled decoy

The group arrives at their old lair to find it deserted, realizing the Shredder believes they are dead—an advantage Splinter insists they use to launch a surprise attack. Episode Details Series: Teenage Mutant Ninja Turtles (2003)