The Dragon's Capital (龍の都 Ryū no Miyako) is the eleventh episode of Ultraman Gaia.
The investigation into a water shortage in Tokyo leads to the appearance of multiple dragon-like heads from underground, and Gamu has to guide Team Hercules to the location of creature's body.
- Ultraman Gaia Volume 3 features episodes 9-12.
- The episode gets its name because Mizunoenoryu lives in a cave under the city of Tokyo.
- This is second appearance of Team Hercules, after their appearance in episode 2.