Episode 18, "Marcoh’s Notes"
*****SPOILERS*****
Synopsis: The mysterious people in black, Lust and Gluttony, fight Scar in the Central First Branch library and cause it to burn down. When Ed and Al arrive, and are given new escorts (Maria Ross and Denny Brosh), they discover the library has been destroyed, dashing their hopes of finding Marcoh’s hidden research notes. They consult with a woman named Sheska, who formally worked there, who they discover has the ability to remember everything she reads, and makes a copy of Marcoh’s notes. However, the notes are all coded and the brothers have difficulty decoding. Eventually they do, and are horrified by the secret behind the Philosopher’s Stone: it’s made from human lives.