Combined Strength
Al begins using the Philosopher's Stone to battle against Kimblee and Pride. He manages to trap Pride once again, but is taken by surprise by Kimblee when he starts using his own stone. Meanwhile, as the Armstrong siblings start to gain the upper hand over Sloth, Sloth begins to use his true strength and reveals himself to be the fastest homunculus. Although Al gets apprehended by Pride again, Heinkel, having been healed by Marcoh, manages to deliver a fatal blow to Kimblee. Yoki arrives to rescue Al and the others and head towards Central, while Pride consumes Kimblee. As Alex manages to temporarily impale Sloth on a spike, both he and Olivier are attacked by Mannequin Soldiers. Meanwhile, May fends off both Envy and the Mannequin Soldiers, and Ed's group, overwhelmed by the soldiers, are joined by Roy and Riza.
Aired 11/04/2010EP 52 - Combined Strength
Fullmetal Alchemist: Brotherhood
"In order for something to be obtained, something of equal value must be lost."
Alchemy is bound by this Law of Equivalent Exchange—something the young brothers Edward and Alphonse Elric only realize after attempting human transmutation: the one forbidden act of alchemy. They pay a terrible price for their transgression—Edward loses his left leg, Alphonse his physical body. It is only by the desperate sacrifice of Edward's right arm that he is able to affix Alphonse's soul to a suit of armor. Devastated and alone, it is the hope that they would both eventually return to their original bodies that gives Edward the inspiration to obtain metal limbs called "automail" and become a state alchemist, the Fullmetal Alchemist.
Three years of searching later, the brothers seek the Philosopher's Stone, a mythical relic that allows an alchemist to overcome the Law of Equivalent Exchange. Even with military allies Colonel Roy Mustang, Lieutenant Riza Hawkeye, and Lieutenant Colonel Maes Hughes on their side, the brothers find themselves caught up in a nationwide conspiracy that leads them not only to the true nature of the elusive Philosopher's Stone, but their country's murky history as well. In between finding a serial killer and racing against time, Edward and Alphonse must ask themselves if what they are doing will make them human again... or take away their humanity.
(Source: MAL Rewrite)