You can now watch the entire Sonic Underground Season 1 Episode 15 movie online in high-definition quality, complete with English subtitles for a better viewing experience. Best of all, there’s no need to download anything—simply stream it directly from your device anytime, anywhere.
Sonic Underground: Sonia inherits a spooky and dilapidated castle, and she enjoys the idea of making it the Underground headquarters. But all is not as it seems when they stay there overnight.