Fullmetal Alchemist: Brotherhood - episode 20 - 15 Aug, 2009

An unhappy Edward overhears a conversation Hohenheim has with Pinako about whether or not the corpse that the Elric brothers had attempted to transmute was actually his mother. Hohenheim leaves the next day, warning Pinako that something horrible will happen in this country. Alphonse explains to Ling the circumstances of his body, and Winry is appalled when Ling doesn't care about the consequences of Alphonse's body. Determined to find the true answer, Edward and Pinako dig up the corpse of the failed transmutation during a downpour, though Edward keeps retching at the thought. When the body has been unearthed, he realizes it was not their mother that they transmuted. Edward then calls Izumi and asks about the legitimacy of her human transmutation, but she does not answer. Edward returns to Central and reunites with Alphonse and Winry, reassuring them of the possibility of restoring Alphonse's body. Izumi calls Edward back, saying she had the same results as him, which confirms his suspicions of the possibility, but not of reviving what has been deceased. Edward, Alphonse, and Izumi feel a sense of relief that they had not killed their loved ones a second time. The Elric brothers reaffirm their resolve to return Alphonse to his original body. (Source: Wikipedia)