Death of the Undying

Nineteenth in the Brotherhood series, this chapter turns a pursuit of Barry's runaway body into a deadly showdown with Lust beneath a Central laboratory. Roy Mustang and Jean Havoc are gravely wounded trading blows with the regenerating homunculus, but the colonel's cauterizing flames and sheer persistence finally reduce her to dust. The hour also ends Barry the Chopper and sets Edward face to face with the father he has not seen in years.

Overrun by Gluttony, Hawkeye is saved first by Fuery and Black Hayate, then by Mustang, whose fiery blast buys the team time even as Riza scolds him for exposing himself. Following Barry's trail to Laboratory 3, Mustang recognizes the site implicates Military Command and learns from Alphonse that these regenerating monsters are homunculi. Deep inside, Lust greets Mustang and Havoc, bares her Ouroboros mark and the Philosopher's Stone at her core, and shrugs off a leg wound before splitting a water pipe to smother the colonel's flame. Roy responds by cracking the spilled water into combustible gases and igniting it with Havoc's lighter, but Lust reforms and impales Jean through the gut. The colonel tears the stone from her chest, only for her body to rebuild around it and run him through as well, and wounded and desperate, he uses the lighter's flint and the circle on his hand to sear both men's injuries shut. Elsewhere Alphonse and Hawkeye reach Barry, who has finally wrecked his rotting human form, and Lust arrives to cut the Chopper down. When she threatens to send Riza to join Mustang, Hawkeye breaks down, and Alphonse shields her until Roy staggers in and unleashes wave after wave of fire until Lust's stone runs dry and she crumbles for good. Watching from the entrance, Bradley sheathes his blade and quietly departs, and Barry's dying human body drags itself to his blood rune and scratches it out, ending them both. Back in Resembool, Edward returns to find Van Hohenheim standing at his mother's grave.

The episode draws on three chapters, and its title card pairs Mustang's flame sigil with the Ouroboros. A joint clash pitting Ling and Lan Fan against Envy and Gluttony does not appear here, nor does the earliest nod to the homunculus Pride. A small continuity slip leaves Barry's earlier bullet wound absent from a later shot. The preview was worded to make viewers think the ominous title referred to Hawkeye, and this is the only English airing where Havoc's first name is pronounced the French way. It marks the permanent deaths of both Lust, the first homunculus to die for good, and Barry the Chopper, and it carried a TV-MA rating on its American broadcast.