List of Young Justice episodes

Young Justice is an American animated television series created by Greg Weisman and Brandon Vietti for Cartoon Network. The series follows the lives of teenaged heroes who are members of a covert operations team that takes orders from the Justice League. The series debuted on January 7, 2011 with a two-week reairing of the first two episodes, which originally aired as an hour-long special on November 26, 2010. After an extended hiatus starting in 2013, Warner Bros. Animation announced the show's return for a third season on November 7, 2016.

After helping Batman, Aquaman, Flash, and Green Arrow take down Mr. Freeze, Killer Frost, Captain Cold, and Icicle Jr; Robin, Aqualad, Kid Flash, and Speedy are brought to the Hall of Justice. Speedy is disappointed that they can't become members of the Justice League and walks out after admitting to the other three sidekicks that the Justice League's real base is orbiting the planet. While the Justice League are called away by Zatara to help in preventing Wotan from blotting out the sun, Robin, Aqualad, and Kid Flash break into Cadmus (which was on fire at the time) and find that it is being run by Mark Desmond and the Genomorphs in the building's sub-levels. While there, the sidekicks find a clone of Superman known as Superboy.

...
Wikipedia