Under Lock and Key

Under Lock and Key is the ninth episode of Season Three of Kids' WB's X-Men: Evolution. It was written by Sean Roche and directed by Frank Paur. It is the thirty-ninth episode of the series overall, and premiered on November 30, 2002.

Overview
''Angel spots Gambit stealing a mysterious artifact, but when he tries to stop him, Mesmero fights him off. When the second key to unlock Apocalypse is found, the X-men find themselves in a battle against the Acolytes. The X-men want to protect it, while the Acolytes want to destroy the key. Soon both teams will discover there is a bigger plan happening and will have to face a spider-like being which is virtually unstoppable.''

Trivia

 * This is the third episode with a hint and it's the most major hint about Apocalypse's coming.
 * Mastermind has joined the Acolytes.
 * While Boom Boom has returned to the New Mutants.
 * During the baseball game, you can see Kurt's girlfriend, Amanda, cheering in the crowd.
 * The "Evolution" counterparts to the five original X-Men (Angel, Beast, Iceman, Cyclops and Jean Grey) are assembled here for the first time.
 * Jean Grey's original codename was Marvel Girl, in the original comics.