Episode 7, "The Hidden Truth"
*****SPOILERS*****
Synopsis: Edward and Alphonse are in a bind when the 1st Branch of the Central Library is burned down, with all of Marcoh’s reasearch in it. However, with the help of Maria Ross and Denny Bloch, their new escorts, they track down a woman named Sheska, who used to work at the library. Sheska has the unique ability to recall everything she has read, and copies what she read of Marcoh’s notes, which are encoded as recipies. Edward eventually deciphers the code and comes to the realization that the Philosopher’s Stone is made of living humans, and likely by using prisoners. The Elric brothers sneak into Laboratory 5, a supposedly abandoned lab next to the prison. They aren’t alone, however, and while Ed sneaks deep inside, an armored guard attacks Al.