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The Big O poster
TV Series Finished Fall 1999

The Big O

THE Big O · THEビッグオー

Action Mecha Mystery Psychological Sci-Fi
★ 7.4AniList score
13Episodes
24 minPer episode
SunriseStudio
OriginalSource

Paradigm City is a place without a past. 40 years ago, something happened that wiped the memories of everyone in it. Unfortunately, the people of Paradigm City were very busy before then, making Megadueses (giant robots) and monsters.… Read more

Storyline

Paradigm City is a place without a past. 40 years ago, something happened that wiped the memories of everyone in it. Unfortunately, the people of Paradigm City were very busy before then, making Megadueses (giant robots) and monsters. People who were born after the memory wipe are gaining/recovering memories of the past and using them to build newer threats. With the help of The Big O (a faithful giant robot), his butler Norman and the android Dorothy, Roger Smith keeps Paradigm City safe. As problems mount and more memories surface, Roger's past and Paradigm's future begin to become suspect...

Trailer

Characters & Japanese Voice Cast

R. Dorothy Wayneright R. Dorothy Wayneright Main VA: Akiko Yajima
Roger Smith Roger Smith Main VA: Mitsuru Miyamoto
Angel Rosewater Angel Rosewater Main VA: Emi Shinohara
Norman Burg Norman Burg Main VA: Motomu Kiyokawa
Michael Seebach Michael Seebach Supporting VA: Katsunosuke Hori
Dan Dastun Dan Dastun Supporting VA: Tesshou Genda
Jason Beck Jason Beck Supporting VA: Houchuu Ootsuka
Alex Rosewater Alex Rosewater Supporting VA: Unshou Ishizuka
Alan Gabriel Alan Gabriel Supporting VA: Issei Futamata
Big Ear Big Ear Supporting VA: Shinpachi Tsuji
Vera Ronstadt Vera Ronstadt Supporting VA: Sayuri
Gordon Rosewater Gordon Rosewater Supporting VA: Gorou Naya

Seasons & Related Anime

SequelThe Big O II TV Series · 2003

Similar Anime

Frequently Asked Questions

How many episodes does The Big O have?

The Big O has 13 episodes.

Which studio made The Big O?

The Big O is produced by Sunrise.

Facts from AniList (also listed on MyAnimeList); streaming availability from JustWatch India. Last updated 1 November 2026, 8:21 PM IST. Episode times are Japan broadcast times shown in IST. Spotted a mistake? Write to [email protected].