Based on the comic series of the same name, Young Justice will follow the adventures of the teenage superhero sidekicks Aqualad (the team leader, approximately age 15 or 16), Robin (age 13), Kid Flash (age 15), Superboy (age 16 weeks), Miss Martian (age 16 in Martian years), and Artemis (age 15).
Sorry, no info about the next episode of Young Justice is available yet.
The TV show is either in vacation or waiting to start their new season. When information about future episodes becomes available, it will be posted here.