

Episode 12: “One is All, All is One”
- 12 of 64
- June 21, 2009
- 24 min
- Aired
Contents
| Series | Fullmetal Alchemist: Brotherhood |
|---|---|
| Episode | 12 of 64 |
| Japanese | 一は全、全は一 |
| Original air date | June 21, 2009 |
| Episode length | 24 min |
| Studio | Bones |
| Previous episode | Episode 11: “Miracle at Rush Valley” |
| Next episode | Episode 13: “Beasts of Dublith” |
| Streaming | Crunchyroll, Netflix, Prime Video, Hulu |
“One is All, All is One” is episode 12 of the anime Fullmetal Alchemist: Brotherhood. It first aired on June 21, 2009.
Summary
The summary below describes what happens in this episode.
Edward Elric and Alphonse Elric reach Dublith and reunite with their teacher, Izumi Curtis. Their reunion leads them to recall their first meeting with Izumi and the demanding training she required of them.
Characters in this episode
Music in this episode
- OP 1“again” — YUIAnimeThemes
- ED 1“Uso” — SIDAnimeThemes
Where to watch
Streaming services that list Fullmetal Alchemist: Brotherhood. What you can watch depends on your country. Acino does not host any video; each link leads to the service's own page.
Episode guide
All 64 episodes → · 17 of 64 episodes have a summary
About the series

The story follows two brothers on a journey to restore their bodies after a failed attempt at human transmutation. Along the way, they uncover a nationwide conspiracy and explore their country's history.
Read the article →References
- “Fullmetal Alchemist: Brotherhood”. Kitsu. Retrieved October 22, 2026.
- “Fullmetal Alchemist: Brotherhood”. MyAnimeList. Retrieved October 27, 2026.
- “Fullmetal Alchemist: Brotherhood”. AnimeThemes. Retrieved October 23, 2026.
Episode titles and air dates come from Kitsu. The summary is written by Acino with AI assistance and checked so that it does not copy other sites.