Enemy of My Enemy (2012 TV series episode)

"Enemy of My Enemy" is the twentieth episode of the 2012 TV series. It aired on April 12, 2013.

Plot Synopsis
The episode begins with The Turtles watching TCRI for some type of ship. Karai comes along and fights the Turtles. Karai tries to get information about the Kraang out of Leonardo, but Leo refuses to answer her due to her betrayal in The Alien Agenda. However, Raphael accidentally reveals the Kraang's plan to her just as a ship comes and shoots lasers at them. Karai manages to lose the Kraang by ducking in an alley, but the turtles struggle to escape from them. Leo is able to distract the Kraang in order for him and his brothers to hide in the sewers. After they witness the ship turn invisible, the turtles and Karai leave.

Karai tells The Shredder about the threat the Kraang poses. Unfortunately, due to his stubbornness, he tells her to ignore them and focus on securing the weapons and defeating Splinter and the turtles. She tries to reason with him, but he snaps and dismisses her.

In the lair, the turtles discuss how they should defeat the Kraang. Raph suggests they shoot in the sky, but Leo shrugs it off. However, Donnie says they should strap locators to buildings to locate the invisible Kraang ship. They all agree and set out to the surface.

After securing his locater, Leo starts fighting Karai. She manages to ask him for an alliance because the Shredder didn't listen to her. Again because she left him and his brothers in the mercy of the mutant she created, Leo rejects her and leaves. But in the lair, Leo talks to his brothers, Splinter and April about trusting Karai. Splinter tells him to trust his instincts, but Raph tells them not to. Donnie says it would be nice to have her on their side, but he gets flustered when April gets offended when he doesn't acknowledge her as a kunoichi.

When the turtles locate the Kraang scouting ship, they get cornered in an alley and are attacked. However, Karai saves them, but she is left on the ship attacking it. Leo takes the shell-cycle and finds and saves Karai. He's able to use the cloaker to hide them from the Kraang.

He brings her to the lair where they listen to her. She offers them a rocket launcher from the Shredder's weapon armory they could use on the ship. Like Leo, the turtles hesitate on trusting her. She tells them that she, unlike the Shredder, is willing to stop the Kraang so they can live to fight another day. They all agree and agree on a temporary truce.

At the lair, Mikey excitedly talks about what they could do with the rocket launcher after they shoot the Kraang ship. However, Leo doubts Karai will agree and give them the launcher. Just then, Raph tells Leo that this is their chance to set a trap for Shredder. At first, Leo disapproves of the plan because he doesn't want to betray her trust, but then he agrees after Raph tells him this could be their only chance to take him by surprise. Raph is excited about this, but Leo looks away with a worried look on his face.

At the docks, Karai goes to the armory to get the rocket launcher, However, she notices Mikey is about to fire a taser at Shredder and shoves him out of the way. Shredder chases the Turtles and has them trapped, demanding them to tell them where Splinter is. However, he ducks into a cargo box and is locked in when the ship attacks. Leo locks him in the box and runs out, but Shredder intercepts the rest of the turtles. Leo goes after Karai and she tells him that the truce is off and they are now mortal enemies because the turtles tried to attack her father.

Meanwhile, Raph, Donnie, and Mikey face the Shredder. Shredder is still stronger than them, but after the weeks of training they are able to put up a good fight against him. Leo shoots the ship with an RPG and it crashes in the water, taking the Shredder down with it. Karai dives in and saves the Shredder from drowning. The turtles escape and discuss later that night about Karai being the Shredder's daughter. Unfortunately, unbeknownst to them, the Shredder reveals he has captured a Kraang and states that she had "always wanted a pet".

Trivia

 * Karai returns, attempting to be an ally to the turtles.
 * It backfires. Instead, she becomes a full-sworn enemy of the turtles.
 * Donnie teases Leo about liking Karai.
 * Just like The Alien Agenda, Karai and Leo's relationship ends before it really begins.
 * Karai finally reveals the Shredder is her father.
 * More of the Shellraiser is shown off.
 * This is the second time that Shredder has faced the turtles.
 * Raph drives the Shellraiser and Leo rides the Stealth Bike for once.
 * Apparently, Karai can drive a motorcycle
 * Karai now feels what Leo felt when she betrayed him in Alien Agenda.
 * The end credits name the Russian arms dealer "Steranko", whose name did not come up at all in the episode.
 * It is the 2nd time that the turtles fight Shredder.

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