A new wave of young heroes must face down an alien threat to the planet.
EPISODE 1
Independence Day
In the premiere episode, Robin, Speedy, Aqualad and Kid Flash are finally granted access to the headquarters of the Justice League. But when that access turns out to be little more than a glorified backstage pass, Speedy walks, and the other three go on a mission of their own -- to Project Cadmus -- where they make a startling discovery.
EPISODE 2
Fireworks
Robin, Aqualad and Kid Flash are prisoners of Project Cadmus. Their only hope is to convince Superboy to switch sides and help them break free…
EPISODE 3
Welcome to Happy Harbor
After Speedy declines to join the new team, Dick Grayson, Kaldur'ahm and Wally West fear Young Justice is just a big joke -- and new member M'gann M'orzz fears there's no room for her to be part of it. So when the four heroes and Superboy come up against Mister Twister, it looks like all their fears have just been realized....
EPISODE 4
Drop Zone
On their first official assignment -- a covert recon mission to the venom-producing island of Santa Prisca -- the team finds itself caught in a struggle between the deadly Bane and cult leader Kobra for possession of something far worse than they suspected. Can Robin lead the team to victory? Can Robin lead the team at all?
EPISODE 5
Schooled
Superboy's anger over his non-relationship with Superman is getting out of control. He refuses to train with Black Canary, and when the team faces an opponent that even the Justice League had trouble defeating, the Boy of Steel goes rogue.
EPISODE 6
Infiltrator
Artemis faces an uphill battle trying to win over her new teammates as she tries to fill Red Arrow's boots on a mission he initiated: saving a brilliant young scientist from the League of Shadows.
Young Justice: Seasons 1-3
Jesse McCartney
Bruce Greenwood
Lacey Chabert
Rob Lowe
Jason Spisak
Khary Payton
Danica McKellar
Stephanie Lemelin
Nolan North
Zehra Fazal
Grey DeLisle