Fullmetal Alchemist: Brotherhood - episode 28 - 17 Oct, 2009

Alphonse and Gluttony arrive at Father's lair, when Edward, Ling, and Envy burst out of Gluttony's stomach. Father then uses his strange powers and cancels out Edward and Alphonse's alchemy, rendering them vulnerable. Ling is then captured and given the philosopher's stone, which he willingly accepts, allowing Greed to take over his body. Scar and May then arrive and engage in battle, where their alchemy is still effective. Scar learns about the murder that Envy committed which triggered the Ishbal civil war and attacks Father, only to find his powers ineffective against him. May gets injured, and Scar uses a hydrogen explosion as a diversion so that they can both escape. Edward battles Greed and is quickly subdued, although he can sense that Ling is still inside Greed. As a result of the earlier explosion, Gluttony uses up the last of his regenerative abilities, so Father extracts his philosopher's stone, promising to revive him with his memories intact. (Source: Wikipedia)