Air Date: July 26, 2003
Scott Menville - Robin
Tara Strong - Raven
Greg Cipes - Beast Boy
Khary Payton - Cyborg
Hynden Walch - Starfire, Blackfire
Rino Romano - Kai
David Soboov - Cron
Director(s) - Alex Soto
Storyboarder(s) - Joung Choi, Sam Liu, Irineo Maramba, Sam Montes, Chap Yaep, ames Yang
Writer(s) - Amy Wolfram
Summary: Much to the surprise of Starfire, her older sister Blackfire unexpectedly pays a visit to Earth. Blackfire gets along with all the Titans, she's cool, and she fits in with humans perfectly, causing the redheaded Tameranian to feel left out. But is Blackfire's sudden appearance just an innocent family reunion, or does she have a secret?
- First appearance of Starfire's older sister Blackfire.
- Although it is claimed that this was Blackfire's first visit to Earth, she certainly speaks English better than Starfire. She had to have kissed someone to learn the language. We learn in episode "Go!" that Starfire kissed Robin when they first met so she could speak his language, but she still speaks without slang. How does Blackfire know English so well, and how has she adapted to Earth much easier than Starfire has, despite having just visited?
- Although he never appears on the TV series, Starfire is also known to have a younger brother named Ryand'r (Wildfire). Starfire is a middle child.
- This is the first episode in which it's hinted at that Starfire and Robin have a crush on each other.
- Goth Boy makes his first appearance at the club, chatting with Raven.
- Speaking on this episode, Glen Murakami said, "Besides action and humor, interaction will be an important part of the series....Every story has a moral that I think kids can relate to....‘Sisters’ is about sibling rivalry and Starfire learning about herself. And I think the Titans’ problems are something that kids have to deal with.”
- Writer & story editor Amy Wolfram said, "I think everyone—at some point in their lives—feels like they don’t fit in. And that someone else has it easier. And that’s where that came from. I mean, I was never the 'head cheerleader' or anything like that. I felt I was someone just trying to figure out who I was. I think when you put Starfire in this environment, she doesn’t see all the wonderful things about herself. Then put her sister next to her—a sister that can do everything! It’s interesting to see a superhero have a sibling she feels inferior to. And that’s really how we approached that one. It’s about siblings. And how you sometimes feel inadequate next to them...There’s that scene where Starfire is in the disco club. And she’s really not getting it. And meanwhile, her sister is dancing and having a great time. I think a lot of people have felt that. We always wanted it to be something that would feel real. Something that people would ‘get.’"
- Starfire mentions that the sound of fireworks on her planet would indicate "the Gordanians are attacking." The Gordanians were a lizard-like race of aliens who enslaved everyone they conquered. In "Go!", it's revealed that Starfire was one of their slaves before she met the Titans.
- In the comics, Blackfire was born without the ability to fly. For this reason, she did not inherit the throne, despite being older than Starfire. This is why she hated her younger sister. She killed Starfire's pet, betrayed Tameran to the evil Gordanians and sold her sister into slavery. The next time the two met, they nearly killed each other. Later, Blackfire ruled Tameran and managed to soften her ways, but the sisters still did not get along.