Writer:	David Slack
Director:	Ben Jones
Star:	Tara Strong (Raven),  Scott Menville (Robin),  Hynden Walch (Starfire),  Khary Payton (Cyborg),  Greg Cipes (Beast Boy)
Recurring Role:	Scott Menville (Red X)
Guest Star:	James Hong (Prof. Chang)

In the Teen Titans comics, there was no Red X. He was made up by the creators, specifically for the animated series. (edit) Robin episode. (edit) Villain Debut(s): Professor Chang. (edit) The Soto Warehouse is similar to the Disco Hall shown in "Sisters." (edit) Opener: Robin narrates as the team chases someone who broke into the Soto Warehouse, and that "someone" turns out to be Red X. (edit)

Robin: Better luck next time.
Red X: Not bad, kid. Not bad. (Smashes the Zinothium on the ground, which explodes) (edit) Red X: Time to get what I came for.
Raven: Time's up.
Robin: Thanks for the help, X, but don't think the means you can help yourself. (Holds up a disk)
Red X: No problem, kid. This should keep me up for a good long time.
Robin: That won't do you much good without this. (Holds up belt that powers Red X's suit) (edit) Robin: You don't even care, do you? A low-life maniac has just got his hands on enough Zinothium to disintegrate the entire city, and it's your fault!
Red X: Don't you mean our fault?
Robin: At least I'm going to DO something about it. And if you care about anything other than yourself, you'll be helping.
Red X: Sorry, kid, some guys don't like to play the hero.
Robin: Then I'll be back to take you to jail. (edit) (After Prof. Chang's men attacked Red X & Robin)
Red X: (Recovering) Ugghh... Ughh... Uhh... Oh... Okay, who were the moon men? (Gets trapped in a cage) Huh?!
Robin: Criminals! Just like you.
Red X: Come on, kid, you don't really think this little play pen can hold me.
(Robin electrifies the bars of the cage, which electrifies Red X) (edit) Robin: The scanner Red X stole will locate any Zinothium in a ten mile radius.
Starfire: So, we must locate it first.
Cyborg: X isn't the only one with a scanner, I'm downloading the molecular signature and transmitting to your communicators.
Robin: Thanks, but I won't need it.
Cyborg: How are you going to find the Zinothium without a scanner?
Robin: The same way I found it the first time. (edit)

Beast Boy seems unable to change quickly in this episode, as we see when he stays a rhino when attached to Raven for a while, and when he turns into a hippo and falls off the beam. (edit) We've seen Robin get hit much harder than what Red X does to him, yet he seems to be unable to move. (edit) Beast Boy attempts to guess the origins of the new Red X by theorizing that Red X is a bionic monkey infused with Robin's DNA, if he isn't Robin's evil twin.

Other theories that Beast Boy put forward in his visual presentation, but did not mention were:

1) Red X is Nightwing (Robin's future alias - See Season 2 Première episode 'How Long is Forever?') who has travelled back to the present;

2) Red X is 'part of a clone army' and is in fact Larry the Titan (See episode 'Fractured'), an inter-dimensional imp;

3) Red X is Robin's long lost brother;

4) Red X is Jason Todd (The 2nd Robin in the comic books, Dick Grayson's successor to the Robin guise). Given that Larry's name & DNA suggested that Robin's real identity is that of Dick Grayson, this is unlikely. In the comics, Jason became Robin when Dick quit being Batman's sidekick and became Nightwing. (edit) Raven can use her powers to remove, move, lift things, right? Well, why didn't she take off Red X's mask? (edit) Only the Titans and Slade seem to know Robin's connection to the original Red X. So, there's a possibility that the new Red X is someone who once worked for Slade. That also explains how he knew how to use his gadgets, how to break their security system (see trivias about it), and how he knew what kind of fuel he had to get. Still, about the other trivias, he could be wearing another mask before getting Red X's outfit. (edit)

Molecule by Molecule: Danny Phantom
When Professor Chang is talking to Starfire in her frozen state, he says "Ever seen someone ripped apart molecule by molecule." A hand motion accompanies this where his fingers on both his hands make the zero sign while touching one another and then are pulled apart. This is an allusion to the Danny Phantom movie "Reality Trip," where a running gag were those words along with the hand motion. (edit) Professor Chang: Appearance
Professor Chang looks very similar to another James Hong character, Dr. Chew, from the sci-fi classic Blade Runner. (edit) Reference: Dove
When Red X and Robin are working together in Prof. Changs HQ, a dove flies by. A dove is often a symbol of friendship to most people. (edit) Red X's Identity: Jason Todd (Theory)
One of the theories Beast Boy presents is that the new X is Jason Todd. Jason is the second Robin (after Dick Grayson, before Tim Drake) adopted by Batman in the comic book series. He is not acknowledged in any of the DCAU shows to date. This is possibly the only appearance of "Jason Todd" in the cartoons. (edit) Red X: Character
Red X is simiar to Carmen Sandiego from Where in the World is Carmen Sandiego? because they are both thieves and do good and bad things. "Thieves with honor" like saving people. (edit)