The Big O
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Anime DetailsFINISHED

Format:TV
Episodes:13
Episode Length:24 mins
Season:FALL 1999
Studio:Sunrise
Source:original
Estimated watch time
5h 12m
⚡ 3 days at 5 eps/day

Tags & Tropes

Super Robot97%Amnesia97%Philosophy96%Noir94%Episodic91%Robots90%Dystopian85%Butler83%Foreign82%Cyberpunk76%
TVFINISHED1999 FALL7.4 / 10 AniList score

The Big O

THEビッグオー• THE Big O
overview details

Synopsis & Story

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...

Where to Watch Officially

A streaming link is not listed for this title yet.

Franchise Universe & Related Entries

Aniphoria guide

The Big O: should you watch it?

At a glance

The Big O has been well received, with an average AniList score of 74/100 — 55% of 7,430 ratings are 8/10 or higher.

It ranks #7 highest-rated anime of 1999, and #7 most popular anime of 1999 on AniList.

Of the 13.8K AniList users who started it, 5.0% dropped it, so it is dropped at a typical rate; 10.5K have finished it.

At about 5 h 12 min in total, it is a short commitment — a weekend binge.

Best for viewers who enjoy Action, Mecha, Mystery — especially super robot, amnesia, philosophy, noir.

Where it fits in the series

  • Start here. The Big O is the first entry in its story.
  • Watch next: The Big O II (2003)
Full franchise watch order

Episodes

26 episodes are listed.

Main cast & creators

Original creator
Hajime Yatate
Series composition
Chiaki Konaka
Series composition
Kazuyoshi Katayama
Character design
Keiichi Satou

Opening & ending themes

Openings

  1. OP1“Big-O!” by Rui Nagai · eps 3-13
  2. OP2“Respect” · eps 15-20, 22-25

Endings

  1. ED1“And Forever...” by Robbie Danzie

Theme data from AnimeThemes.moe.

The Big O FAQ

How many episodes does The Big O have?
The Big O has 13 episodes of about 24 minutes each, roughly 5 h 12 min in total.
How long does it take to watch The Big O?
About 5 h 12 min back to back. At two episodes a day it takes 7 days; at one hour a day, about 6 days.
Is The Big O finished?
Yes. The Big O has finished airing — the final episode aired January 19, 2000.
Is there a season 2 of The Big O?
Yes — the story continues in The Big O II (2003).
Where do I start The Big O?
Start here: The Big O is the first entry, followed by The Big O II.
Is The Big O based on a manga?
No. The Big O is an original anime story, not adapted from a manga or novel.
Who animated The Big O?
The Big O was animated by Sunrise and directed by Kazuyoshi Katayama.
Who sings the opening of The Big O?
The opening, "Big-O!", is performed by Rui Nagai.