What Lies in the Abyss
Sion and Nezumi climb through the huge pile of bodies where they were dropped in and infiltrate the facility searching for Safu. Meanwhile, Rikiga and Inukashi leave the baby Sion saved to one of the dogs and gain entry into the facility by themselves to clear a path for Sion and Nezumi. Somehow, Sion knows exactly where to go and where all the cameras are, and this makes Nezumi a bit suspicious. He and Sion fight their way through the complex until Nezumi is wounded by a security guard. Sion kills him in retaliation much to Nezumi's grief. When the duo manage to get through Safu's location, they find that she broke herself free and the researchers around her are lying dead on the ground.
Aired 09/09/2011EP 10 - What Lies in the Abyss

No.6
In a near future world, after the last great war, most of mankind lives in a handful of city states. There, for the privileged elite, life should be perfect. But for young Shion, the only thing perfect has been the nightmare his life has become since letting a strange boy called Rat spend the night in his apartment.
Banished to the outskirts of the city and stripped of all privileges for helping the mysterious stranger who has since disappeared, Shion now finds himself in even worse danger as his inquiry into a new series of mysterious deaths results in his being arrested on suspicion of murder!
But even as Shion is being sent to the city's Correctional Institute, the long-missing Rat reappears to rescue him! Now on the run, the two young men have only one chance at survival: uncover the mysterious secrets that lie at the sinister heart of No. 6!
(Source: RightStuf)