Fullmetal Alchemist: Brotherhood - episode 37 - 19 Dec, 2009

Edward has his automail fixed by Winry, while Kimblee issues orders to keep Alphonse separated from Edward. Olivier sends a search party down into the tunnels, who find a couple of survivors that warn them not to put any lights on, or else a monster would come. Hawkeye learns that Selim is a homunculus named Pride, who attacks from the shadows. Kimblee orders Edward to search for Scar and Marcoh, and to create a blood crest similar to Ishval in Briggs Fortress, tempting him with a philosopher's stone if he accepts. After telling Alphonse and Winry about the situation, Edward grudgingly accepts the job, though he does not intend to use the stone himself. As the Elric brothers go to search for Scar, their real intent to find May as well, Winry decides to accompany them. (Source: Wikipedia)