Legion of Super Heroes - Season 1 - Eps 3: Legacy
Superman makes a new friend, Alexis, but his new chum soon becomes obsessive about having Superman as her only friend and not sharing him with anyone else...including the Legion.
About Legion of Super Heroes

Title: Legion of Super Heroes
First Air Date: 2006-09-23
Last Air Date: 2008-04-05
Status: Ended
Rating: 7.2/10 (from 28 votes)
Language: EN
Seasons: 2
Total Episodes: 26
Network: The CW
Genres: Animation, Action & Adventure, Sci-Fi & Fantasy, Kids
Production Companies: Warner Bros. Animation, DC, DC Entertainment
Synopsis
The series centers on a young Superman's adventures in the 31st century, fighting alongside a group of futuristic superheroes known as the Legion of Super-Heroes.
Cast

Yuri Lowenthal
Superman / Kell-El (voice)

Kari Wahlgren
Saturn Girl (voice)

Adam Wylie
Brainiac 5 (voice)

Andy Milder
Lightning Lad (voice)

Shawn Harrison
Timber Wolf (voice)

Michael Cornacchia
Bouncing Boy (voice)

Alexander Polinsky
Chameleon Boy (voice)