Fullmetal Alchemist: Brotherhood - episode 6 - 09 May, 2009

While Armstrong escorts Edward and Alphonse back to Resembool by train, he spots a man named Tim Marcoh, the "Crystal Alchemist," at a nearby stop. He explains that Marcoh was a state alchemist and doctor during the Ishval civil war, and conducted research on biological alchemy before disappearing at the end of the war. They decide to chase after Marcoh, only to learn that he was researching the philosopher's stone. He had succeeded in its creation, though it is still incomplete. At first refusing to share his knowledge with Edward, Marcoh eventually gives them a clue to the location of his research data. After they reach Resembool, Winry Rockbell and her grandmother Pinako Rockbell start working on Edward's automail. After receiving his replacement arm and leg, Edward uses his alchemy to rebuild Alphonse's suit of armor from the shattered remains. Afterwards, the Elric brothers, along with Armstrong, head back to Central to search for Marcoh's research. (Source: Wikipedia)