Dr. Scorpius is Agent K's arch-nemesis in The Replacements. He has a scorpion tail-shaped beard and is usually seen trying to take over the world in some way. He's also known for speaking with a lisp In "The Spy Who Wasn't Riley,", he tried to destroy Antarctica with a giant laser cannon. In another episode, he was seen relaxing on a beach that Todd and Riley happened to be on at the time. In "The Rizzle", Todd finds out that he needs glasses, but Agent K thinks he has been infected with "Dr. Scorpius' Genetically Crafted Island Eye-Fog". Appeared in "The Spy That Wasn't Riley", "Canadian Fakin'", "Glee by the Sea", and "Irreplaceable". Mentioned in "CindeRiley", "German Squirmin'", "The Rizzle", and "Private Todd".