Magical Girl Lyrical Nanoha - Season 3 Episode 11 Riot Force 6's Day Off (Second Part)
Overview: Nanoha, Fate, Shamal, Teana, and Subaru come to aid Caro and Eriol. Eriol, Caro, Teana, and Subaru go down the sewer to investigate. They meet up with Subaru's sister, Ginga, but things take a turn or the worse.