Durarara!!x2 Ketsu Episode 09

"Walking on Thin Ice" is the ninth episode of Durarara!!x2 Ketsu and the sixty-second episode overall of the Durarara!! anime.

Synopsis
The Saika Army surrounding Russia Sushi continues to grow, and Erika Karisawa makes a risky bid for escape. Anri Sonohara setting off to find Celty Sturluson, the Blue Squares preparing to confront Chikage Rokujou forewarn confrontations to come, but the battle to the death between Izaya and Shizuo is already well underway.

Adapted From
adapted from what manga or LN chapter?

Referbacks
references to previous episodes?

New Characters
In order of appearance (not including OP)