Teenage Mutant Ninja Turtles [2003]: Season 4

Casey's cousin comes to the Jones Farm to look for hidden treasure. Unfortunately, he brings some Purple Dragons with him.

Whilst out camping for the night, the four turtles find themselves in the middle of an election. It's not any ordinary election. The two female candidates are from a distant planet where the political process is trial by combat.

Whilst taking a Huck Finn styled trip down a local river, the turtles, Casey and April discover a nuclear power plant - as well as mermen of Y'Lantias - the last of their kind.

Hun's decides to take the Purple Dragons to new heights. To do this he hijacks a top secret government shipment containing one of Bishop's little surprises.

Bishop's Slayer returns in a new form.

Grudge Match: Mikey's blowing off trainings more than ever; he's the BattleNexus Champion, after all! Who needs training?

It's a bird. It's a plane. Okay, it's this guy with angel wings, an Avian, named Raptarr who is after this other guy with metal wings, named Mephos, who wants to take over the Avians' flying city.

Everything that can possibly go wrong for the turtles, does go wrong for the turtles.

Agent Bishop launches a plan to get the President on his side, by making the Turtles look like alien invaders.

Leonardo goes with Casey to put an end to Hun's plans to bring the Purple Dragons to glory. But can both control their anger and succeed in their mission?

Vigilante cop Nobody enlists the help of the Turtles to protect a witness and take down the leader of the Turks, a violent new street gang.

On Halloween night, a hideous six-armed idol is used to invoke a horde of imps and their master, The King of Thieves.

Usagi Yojimbo visits Leo to counsel him. He brings an unruly friend with him - and an assassin.

Leonardo feels he has learned everything Master Splinter has to teach and so Splinter sends him to a see new sensei in Japan "The Ancient One", who trained Splinter's Master, Hamato Yoshi.

While Leonardo trains with the Ancient One in Japan, Karai goes after the remaining Turtles and Splinter who must defend their home from Foot Ninja without Leo's help.

Leonardo returns from Japan to wreak vengeance on the Foot and Karai.

Something is growing and spreading in the sewers and the waterways. The remnants of Bishop's 'aliens' have infected various animals, mutating them into horrible beasts ravenous for anything that gets in their way - including turtles.

April receives a message from her long, lost Uncle Augie who is still trapped in another dimension.

Stockman finally succeeds in cloning himself a new body, or so he thinks. Something has gone horribly wrong and his new body soon begins to decay. Losing both his mind and body, Stockman goes after April O'Neil in revenge.

The evil demon sorcerer Savanti Romero is back. Back in time, that is - and he's stuck in the Jurassic period, but he is still able to cause trouble for the Turtles in the present day.

The Evil demon sorcerer Savanti Romero has managed to lure the Turtles back to the Jurassic period to exact his revenge, as well as get his hands on the Time Sceptre.

The turtles are cleaning up their new lair. Donatello shorts out a circuit breaker causing Michelangelo to flip out, but Splinter suggests telling stories and so Leo relays a story that the Ancient One once told him.

Donatello starts to undergo a horrifying mutation after his previous encounter with Bishop's mutants. The Turtles place him in April and Casey's care but unknowingly put the pair in danger.

Leo, Mikey, Raph, Splinter, and Leatherhead are desperate in curing Donny. Their only choice is to make a deal with the devil (Bishop himself).

The TMNT return to New York to retrieve a pendant that Bishop wants in exchange for Donatello's cure. And it's under the ownership of the New Shredder, Karai.

The turtles are sick of being stuck inside their lair and decide to go out and enjoy the night, but they are approached by strange warriors who make the night a little more interesting.