Plot summary
On his sixteenth birthday, Kid Flash finally finds out about Superboy and Miss Martian being a couple, and is disappointed when he is tasked by Batman to deliver a heart transplant to ten-year-old Queen Perdita, who is next in line to inherit the throne of Vlatava, which stops her devious uncle from becoming regent. Meanwhile, the rest of the Team is sent to join the Justice League and destroy flying fortresses causing nationwide snowstorms. He later realizes that the mission itself was his best birthday gift.
Credits
Adapted from Wikipedia contributors, List of Young Justice episodes. HTML formatting and reference markers removed.