Die Ninja Turtles sind auf der Flucht und allein. Leonardo ist ein Anführer, der niemanden hat.

Raphael gerät zwischen die Mechazoids und die berüchtigte Straßenbande Purple Dragons.

Während er durch das U-Bahn-System rast, kommt es zum Intelligenz-Kampf zwischen Donnie und Bishop. Sie versuchen den Bösewicht Mechazoid aufzuhalten. Doch sie müssen herausfinden, wie sie eine KI besiegen können, die jeden Schritt voraussieht.

Die Mutanten wollen wissen, warum Bishop sie hasst und was das Geheimnis der Mechazoids ist.

Die Mutanten nehmen den Kampf gegen Bishop auf und die Mechazoids geraten außer Kontrolle.

The Turtles and Mutanimals are caught in the Storm of the Century! But when a new group of SEA MUTANTS threaten the city... Raph will be forced to use his WORDS to save the day.

Mikey and Genghis Frog are sent into the storm on a supply run to the local market when they encounter the electrifying LEE THE EEL! Now Mikey has to step up and be a LEADER!

When the Lair floods, April goes to save Splinter... but he won't leave the sewer! To make matters worse, the mutant called GOLDFIN comes with a warning... stay out of his way, or else!

Donnie and Wingnut go to restore power to the Lair but get trapped by the East River 3! The water is rising and they're not alone... there's a monster down there with them!

The mutant seahorse called MUSTANG SALLY is going to flood the city... and the only thing standing in his way are LEO and Pigeon Pete. Being the leader isn't all it's cracked up to be.

The East River 3 are on the verge on victory! The Turtles and Mutanimals must team up to stop them, but not everything is as it seems... what is the PEARL and why does Goldfin want it?