 In "Operation: D.O.G.F.I.G.H.T. (Dueling Over Gooey Frankfurters Inevitably Gives Hoagie Trouble)", Numbuh 2, one of the best pilots in the organization, is suddenly finds himself being bested by another, more mysterious kid pilot who, like Numbuh 2, has a 2X4 aircraft of his own, which he uses to shoot down all of Numbuh 2 s 2X4 aircraft. But when they both realize their supplier has been scamming them into battling one another so that he could destroy every chili dog in town, the dueling dog-faces team up to get even with him. In "Operation: T.R.I.P. (Twins Reconaissance Increases Peril)", Numbuh 3 is heading for her homeland of Japan where she intends to rally with the secretive Japanese branch of the KND, so Father sends his spies, the Interesting Twins From Beneath the Mountain, to follow her to the agents  lair, so an assault can be accomplished. But between their lack of competence and Numbuh 3 s good luck, things for the two spies do not go as planned.