Trivia: Alexis can briefly be seen during the Takron-Galtos prison break.
Brainiac 5: We couldn't have done this without you, Superman. Thanks, both of you. But really, this name thing is getting annoying.
Superman: What are you thinking, Brainy?
Brainiac 5: Maybe something like you kryptonian name, Kal-El.
Superman: What about "Kell-El"? Similar, but different. Just like us.
Kell-El: Fine. Whatever. You can call me "Carl" if it means we can go after Imperiex now.
Lightning Lad: (about to electrocute Esper) This is for Saturn Girl.
Phantom Girl: Wait! She wouldn't want you to go down this path! (kicks Esper) Now that path, I think we can all agree on.
Superman: You came back!
Kell-El: Fighting Imperiex with numerically superior manpower made a certain amount of sense. But this doesn't mean I'm part of the team.
Superman: Fine, but then I can't teach you the secret handshake.
Tyr: I suppose someone should say a few solemn words before the Legion is no more. (laughs) You lose.
Phantom Girl: My mom used to tell me I'd end up on Takron-Galtos if I didn't eat my vegetables. And now, suddenly I have a serious craving for squash. Weird, huh?
Brainiac 5: Superman!
Superman/Kell-El: What? Him or me?
Brainiac 5: Both, either, it doesn't matter!
Lightning Lad: Hate to say it, but it'll be good to see that skinny Kryptonian again.
Superman: Who are you calling "skinny"?
Ron-Karr: (about Kell-El) Ooh. Who's the new guy?
Chameleon Boy: The name's Chameleon Boy. Fellow shapeshifter, and...
Ron-Karr: Not you, him! The guy's a straight-up beast.
Chameleon Boy: Hello! Eyes on me, please! 'Cuz I'm kind of a beast myself.
Superman: (to Kell-El) I know we're supposed to be related, but you remind me more of a friend of mine. Strong-willed, bit of a loner, and when the time came for him to be part of a team, he resisted. And, while he never liked it, he'll tell you he did far more good as a member of that group than he ever could alone. It just took learning how to compromise.
Kell-El: Compromise?! You guys are worried about dozens when trillions will suffer if Imperiex isn't stopped. I'm sorry, but that's not a compromise I'm willing to make.
Phantom Girl: Who is this guy again?
Kell-El: Do I need a nametag? Superman.
Bouncing Boy: We're talking the original, classic, golden oldie, one-and-only Superman.
Brainiac 5: He doesn't play well with others.
Kell-El: I don't play at all.
UK airdate: 22nd April, 2008.
Injoke: Kal-El's small speech about a friend his clone reminds him of is a reference to Batman, as well as the JLA.
Legionnaires who appear without dialogue: Colossal Boy, Cosmic Boy, Sun Boy, Element Lad, Blok, Star Boy, Karate Kid, Dream Girl, Shrinking Violet, Tyroc
Tara Strong takes on the role of Emerald Empress, previously played by Jennifer Hale.