This article is a stub. If you know more about Hit the Target's Underwater Base, you can contribute by editing and expanding it!
The Underwater Base is a base owned by HitTheTarget. It was seen in episode 165 when Stampy and Lee Bear were searching underwater. Mittens was kidnapped/arrested by HTT.
It hasn't returned after that, but it may take another appearence. HTT was seen escaping to it in Christmas Rescue and in one of the easter options in Easter 2015.