When does Young Justice return?

Young Justice is an American superhero animated television series. It is not a direct adaptation of Peter David, Todd Dezago and Todd Nauck's Young Justice comic series. The series follows the lives of teenage superheroes and sidekicks, namely Robin, Kid Flash, Aqualad, Superboy, Miss Martian, and Artemis. The main setting is a fictional universe apart from the previous DCAU and other continuities, designated at one point as Earth-16.