When does My Life as a Teenage Robot return?

My Life as a Teenage Robot is an American animated science fiction superhero comedy television series. It was produced by Frederator Studios and Nickelodeon Animation Studio. The series follows the adventures of a robot super-heroine named XJ-9 (or "Jenny Wakeman", as she prefers to be called), who attempts to juggle her duties of protecting Earth while trying to live a normal human life as a teenage girl.