Showdown

"Showdown" (or 'Booyaka-Showdown') is the 2 part, Season 1 finale of the Teenage Mutant Ninja Turtles 2012 TV Series, and the 25th and 26th episodes. Both of them originally aired on August 8th, 2013.

Official Description
The turtles engage in a difficult battle as they make a desperate assault on TCRI to shut down an alien portal.

Characters

 * Leonardo
 * Donatello
 * Raphael
 * Michelangelo
 * Master Splinter
 * April O' Neil
 * Kirby O' Neil
 * Spike
 * Karai
 * Shredder
 * Dog Pound
 * Fish Face
 * Kraang Prime
 * Traag
 * The Foot Clan
 * The Kraang

Trivia

 * First appearance of Kraang Prime.
 * Last appearance of the Foot Clan, they are replaced with The Foot Bots in Season 2.
 * This is the first time Splinter fights Shredder.
 * This is the first time Leo nearly sacrifices himself (twice) to save his brothers and the world.
 * Splinter finds out Karai is his daughter.
 * Kirby O'Neil was brainwashed because of the chip on his neck that we saw in Operation: Break Out.
 * The "pigeon in front of the camera" bit alludes to how the Turtles broke into the TCRI building in issue #4 of the original Mirage books.
 * It's implied that Donnie made Metalhead self-aware.
 * The Microfission Omni-Disintegrator has the same design as the Sub-Spacial EndoParticle Disruptor, as seen in "Baxter's Gambit."
 * Space Heroes has its final episode.