The Way of Invisibility

Oroku Saki was angry after his latest plan was foiled by the Turtles. After accusing Baxter Stockman and Hun of letting his plans fail, he told them to work together to defeat the Turtles.

At the lair, Splinter was teaching a lesson about the "Way of Invisibility". The lesson wasn't going to well and the arrival of Casey Jones just made things worse. Casey showed the Turtles pictures of graffiti he found all over town. He wanted to teach the vandals a lesson, but the Turtles decided that graffiti wasn't worth the trouble. After a few accidents, Splinter told Casey and Raphael to go topside for some air.

Once topside, the two came across some Purple Dragons spray painting graffiti. The two took out the Purple Dragons, but then the reinforcements arrived. The Foot Tech Ninjas were complete invisible, so the pair were unable to defeat them. Raph was taken to a new location while Casey was left for the Purple Dragons.

When Raph woke, he was in a lab being observed by Stockman and Hun. Hun questioned Raph while Stockman waited for his chance to dissect him.

Meanwhile, Casey escaped the Dragons and told the Turtles what happened. Using Raph's shellcell, they were able to find his location. Donatello also handed out "TurtleVision" goggles, which allowed the Turtles to see the ninja's thermal image.

Back at the lab, Raph managed to escape. He discovered they're on a yacht in the Hudson River, but swimming to shore is no problem for a turtle. Little did Raph know that the escape was engineered so that he'd lead the Foot Tech Ninjas to the rest of the Turtles.

The Turtles met in the sewers and were quickly attacked by the Foot Tech Ninjas. However, the "TurtleVision" goggles evened the odds and allowed the Turtles to win.

Hun and Stockman were left to face Saki's wrath once more. Hun informed Saki that Raph knew nothing of him or his foes, The Guardians.

A Guardian had observed all of this and reported to his superiors that he did not believe the Turtles were allied with Saki. The Guardian was ordered to continue his observation.