Air date: September 13, 2003
Scott Menville - Robin
Tara Strong - Raven
Greg Cipes - Beast Boy, Khary Payton - Cyborg
Hynden Walch - Starfire
Wil Wheaton - Aqualad
Clancy Brown - Trident
Dave Coulier - Captain, Tramm
Director(s) - Alex Soto
Storyboarder(s) - Shannon Denton, Mark Howard, Sam Liu, Irineo Maramba, Sam Montes
Writer(s) - Marv Wolfman
Summary: The Titans follow the amphibious villain Trident into the ocean after he steals a boatload of toxic waste. Beast Boy sees this as his chance to show off, morphing into different marine animals. While underwater, the Titans encounter Aqualad, a handsome, water-breathing hero. Beast Boy is jealous and feels the need to compete with the new acquaintance, but Aqualad just wants to get the job done. Can the two learn to work together?
- First appearances of Aqualad and Trident.
- The opening theme was in Japanese.
- Marv Wolfman, the writer for this episode, also wrote the New Teen Titans comics on which this series is based. He co-created Raven, Starfire, and Cyborg.
- Aqualad was the second honorary Titan.
- David Coulier is best known for his role as Joey Gladstone on the ABC sitcom Full House, which ran from the late 1980s to the mid-1990s. Scott Menville (Robin) had a recurring role as Duane on the show's the last season.
- When Cyborg turns off Beast Boy's microphone in the T-sub, the shapeshifter says, "Hey, is this thing on? Cut it out!" 'Cut it out' was Dave Coulier's catchphrase on Full House. His website URL even references it.
- Clancey Brown voiced Lex Luthor on Superman: The Animated Series and Justice League: Unlimited.
- Aqualad was a founding member of the Titans in the original 1960s series. The other members of that lineup were Robin, Speedy, Wonder Girl, and Kid Flash. Aqualad had been raised by Aquaman and became his sidekick. As an adult, he was known as Tempest.
- Tramm was named for the show's producer-consultant Tramm Wigzell.
- Producer and story-editor David Slack spoke on developing Aqualad for the show: "We went back to same formula: If this is high school, who is he? So we decided Aqualad is the swim team guy—the pro surfer guy. Not the pro surfer 'dude', but the guy who’s serious about it. So that gave us a clue how to write him and make him look. Glen gave him a more streamlined look, wearing something that was like a wetsuit. And he made him just a little bit taller than the guys. A lot of what influences character is also what we need them to do in an episode. We thought Aqualad would be a good rival for Beast Boy, since they both had powers that related to animals....We thought of him as the guy who comes from his own world and has his own set of rules. He’s a strong, athletic, intelligent, very good-looking confident guy who wasn’t trying to impress anybody. That was part of the point of the story. Sometimes people aren’t trying to compete with you—they’re just good at doing certain things. There’s no reason not to like them.”
- Wil Wheaton spoke on his website in November 2002 about being asked to voice Aqualad: "Animation is really fun, because it’s really quick work (usually less than 4 hours for an episode), and the people who do it are all really cool…but it’s also very hard to break into the animation world, because the community is extremely small, and very protective. Being asked by a very respected director to come back, based on her previous experience with me, is just HUGE, and it makes me feel really good, and it may signal my entry into the world of animation.”