Ep. 13: Edward challenges Mustang to a duel for information about Marcoh and the philosopher's stone.
Aired on December 27, 2003

13
The Elrics brief Mustang on the philosopher's stone investigation while Fuery unsuccessfully attempts to rehome a stray dog. Mustang and Hughes discuss Marcoh with Ed until Grand interrupts, labeling Marcoh a deserter. Ed demands re-certification in exchange for information, leading to a sanctioned duel on the parade grounds. Mustang nearly defeats Edward but allows a counterattack due to hesitation. After stopping the match, Mustang shares details about Marcoh. That night, Hughes discloses that a man named Scar is responsible for Bradley's actions. This sequence connects the personal stakes of the Elrics with the broader military conspiracy surrounding the missing alchemist and the mysterious Scar.
Episodes
- Ep. 9 · Ed inspects Youswell coal mines while confronting corrupt military commander Lieutenant Yoki and his servant Lyra.
- Ep. 10 · Elrics assist Aquroya police in hunting alchemist thief Psiren while questioning her motives
- Ep. 11 · The Elrics seek the philosopher's stone in Xenotime while navigating impostors Russell and Fletcher Tringham.
- Ep. 12 · Mugear captures the Tringham brothers while the Elrics investigate Nash Tringham's past research.
- Ep. 13 · Edward challenges Mustang to a duel for information about Marcoh and the philosopher's stone.
- Ep. 14 · Envy impersonates Cornello in Lior while Scar kills Grand and Elrics escape with Armstrong
- Ep. 15 · Armstrong reveals Scar's Ishbalan identity while Marcoh recounts the state alchemist massacre.
- Ep. 16 · Armstrong escorts the Elric brothers to Resembool for repairs while Lust targets Marcoh.
- Ep. 17 · The Elrics Return to Resembool to Repair Ed and Recover Al's Body