The villains were amped up in the second season, as additional comic book characters were introduced to the series, many of them appearing for the first time in live-action. Metallo (Michael Callan), Bizarro (Barry Meyers) as well as the Yellow Peri appeared in the second season and Mister Mxyzptlk (Pollard) made a return appearance. Gilbert Gottfried appeared in two episodes as a nasty, wisecracking criminal genius named "Nick Knack" who used toys to commit crimes (a reference to the Toyman). Another character was a dhampir who found a way through a serum to gain human abilities such as repelling his craving for blood and gaining a tolerance for sunlight. Thus, he became a friend of both Superboy and Lana but would become villainous if doing without the serum for too long. Philip Michael Thomas also made an appearance as a medieval alchemist who survived into modern times in order to battle a sorcerer spreading plague, and aided Superboy when he was infected by said disease. The episode "Superboy... Rest in Peace" featured guest star Betsy Russell, who was reunited with series star Gerard Christopher for the first time since the two had worked together previously in the 1985 movie "Tomboy". Also notable is the guest star appearance of former James Bond actor George Lazenby and Bond girl actress Britt Ekland as aliens disguised as Superboy's Kryptonian father and mother, Jor-El and Lara, in two episodes, "Abandon Earth" and "Escape to Earth".