Detentionaire - Season 1 Episode 4 Math Math Revolution

A chance encounter with his old rival, Irwin of the Mathletes, leads Lee to the conclusion that he is Radcircles. Lee sends Holger in during detention to spy on the Mathletes but he is captured and tortured forcing Lee to sneak out to rescue him. Lee confronts Irwin and the latter reveals that while he did send an email to the Skaters, and then some, it was a photoshopped image of himself and Lee to make it look like the latter was picking his nose. In a subplot Cam is attempting to learn the identity of the one who sent the photoshopped image and in the process learns the identity of Radcircles, former principal of A. Nigma High, Principal Wurst.