The Fall of Darius Dunn

The Fall of Darius Dun is the nineteenth episode of Teenage Mutant Ninja Turtles (2003 TV series).

Plot
Darius meets with Zuko to discuss a certain matter. Zuko teases Dun, having heard that he's slowly losing control over Cody. In anger, Darius brings out a gun, promising Zuko he would get his delivery.

At the penthouse, the Turtles are training Cody in the ways of taking down an opponent by letting him waste his energy. He then goes to O'Neil Tech to work on a project but notices Darius' limo, as he was told he was out of town on business. He sees his uncle talking with Zuko, bringing him to a level filled with weapons. Cody calls the Turtles and the Peacekeepers to the tower but find no weapons line but a garden. Darius, who was tending to his garden, claims that Cody is being influenced and that he should be kept in the penthouse. As everyone leaves, Raph tells Dun it ain't over; Darius says it already is and calls someone.

Later that night, the Turtles, excluding Raph, are trying to get past Serling, who is following Darius' orders. they trick him into a closet, placing precious china by the door so he won't dare break it. They talk with Cody, who is overwhelmed that he had seen his uncle's true nature. Raph calls, as Zuko's goons have come to pick up the goods. Armed with Turtle X, Cody and the others infiltrate O'Neil Tech, learning that weapons line was hidden by space phasing generators, bracelets that shifting molecules to allow two rooms to occupy the same space. On the other side, Darius, in his battle suit (from Invasion of the Bodyjacker), was waiting for them, along with the Dark Turtles. He separates Cody from the others, leaving them to fight against their clones. Darius is angry that Cody kept fighting him, as he was intending to mode him in his way and bring O'Neil Tech into the 23rd century but Cody is too much like his parents, too honest and idealistic. Cody sees that Darius' battle suit is more powerful than his but he remembers the previous lesson and taunts Darius into unleashing all his firepower on him until he runs out of power.

On the other side, the Turtles decide to switch clones and ultimately beat them through their determination to protect Cody. Meanwhile, Darius eventually depletes his battle suit, making him vulnerable. Cody then fires him, literally and figuratively. Darius then flees to an underwater base, swearing revenge.