The Big O (1999–2003)

TV Series  |  TV-PG  |   |  Animation, Adventure, Sci-Fi
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Ratings: 7.6/10 from 1,450 users  
Reviews: 13 user | 12 critic

A futuristic city with lost memories, an expert negotiator fights threats to the city with the help of an android and his own giant robot.


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Series cast summary:
Mitsuru Miyamoto ...
 Roger Smith (26 episodes, 1999-2003)
 Roger Smith (26 episodes, 1999-2003)
Akiko Yajima ...
 R. Dorothy Wayneright / ... (25 episodes, 1999-2003)
Motomu Kiyokawa ...
 Norman Burg (25 episodes, 1999-2003)
Tesshô Genda ...
 Dan Dastun (25 episodes, 1999-2003)
Lia Sargent ...
 R. Dorothy Wayneright / ... (25 episodes, 1999-2003)
Peter Lurie ...
 Dan Dastun (25 episodes, 1999-2003)
Emi Shinohara ...
 Angel (19 episodes, 1999-2003)
Wendee Lee ...
 Angel / ... (19 episodes, 1999-2003)
Unshô Ishizuka ...
 Alex Rosewater (16 episodes, 1999-2003)
 Alex Rosewater (16 episodes, 1999-2003)
 Norman Burg (13 episodes, 2003)
Ezra Weisz ...
 Additional Voices / ... (13 episodes, 1999-2003)
Milton James ...
 Norman Burg (12 episodes, 1999-2000)
Jamieson Price ...
 Big Ear / ... (12 episodes, 1999-2003)
Shinpachi Tsuji ...
 Big Ear (11 episodes, 1999-2003)


Roger Smith acts as a negotiator in a city where everyone has lost their memories and keep it that way. When he isn't helping hostage situations, he's saving the day in a giant robot known as Big O. Although Roger has no idea why the "megadeus" (Big O) responds to his commands or why his butler seems to be a master at fixing the high tech machine, he starts to question the forgotten past after the events started by an unsual case involving an android called R Dorothy. While he and Dorothy begin a Henry Higgins/Eliza Dolittle style of friendship, villains and mysterious characters enter with clues leading up to something that may bring out an emotion Roger has tried to fight all of his known life - fear. Written by Max Vaughn

Plot Summary | Add Synopsis


One part Batman, one part robot, all hero See more »


TV-PG | See all certifications »

Parents Guide:






Release Date:

2 April 2001 (USA)  »

Also Known As:

Big O  »

Company Credits

Show detailed on  »

Technical Specs


(26 episodes)


See  »

Did You Know?


The opening credits with a "radioactive liquid" background with black silhouettes is based on the opening credits of the Japanese sci-fi TV classic, Urutora sebun (1967) (considered the best of the Ultra Series by fans). See more »


Roger Smith: Well, I do have some household rules, Dorothy, and while living here you're obligated to observe every one of them.
R. Dorothy Wayneright: What kind of rules?
Roger Smith: The first one is a rule that even I follow. If you stay here, then you wear black.
R. Dorothy Wayneright: Your sense of fashion, Roger... really reeks.
See more »

Crazy Credits

During the closing credits at the end of the first episode, Roger is shown sitting alone on a large hourglass. After R. Dorothy joins his household, subsequent episodes show them sitting together. See more »


Featured in Anime Abandon: Top 20 Greatest Giant Robots (2013) See more »


Big-O! Show Must Go On
Opening theme
Performed by Rui Nagai
(DVD version)
See more »

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User Reviews

29 May 2004 | by See all my reviews

I am a fan of the Cartoon Network anime lineup, and by far this is the best show out of them all.

Unlike the other, more 'famous' anime shows (hence the Dragonball series), this show actually has realism in it. It isn't all action-packed. The show mostly surrounds negotiator Roger Smith uncovering information related to the jobs that his clients often give him or uncovering deep secrets about the forgotten past, in which an event forty years ago erased everyones' memory. It's pretty much talk, but it's interesting talk, because the talk that goes on throughout the show really relates to real-life situations--political corruption, the love for lost ones, and the desire to know the truth. Though this would bore an adrenaline-junkie, it would catch interest to those that I'd like to call 'down-to-Earthers', especially with the most wonderful music that is just too good to be put in a cartoon series.

But that doesn't mean that there isn't action. The battles that premiere in the series have enough action to supply that adrenaline junkie with all the sweat he needs (and all within just about five minutes, too).

Big O is by far the most successful amongst the dying robot-themed shows. Though the Transformers series seems to be long-lasting, it too is dying out as animators grow tired of constantly putting in the details of machinery and head to using computers as a way to 'build' the robots and give them movement. This type of animation doesn't blend in with the rest of the animation, thus fails (as seen in Transformers Energon).

Which brings up another point. Notice how the animation throughout the entire series remains constant. Sure the lighting changed, but the animation overall has remained the same. It shows that the people who drew up the series were determined to have the animation remain constant and nearly flawless (unlike in the Dragonball series when different animators draw separate episodes). This (especially when having giant robots battling) requires a lot of patience and loyalty.

And let me assure you that they have not gone unappreciated for their loyalty to the animation. Kudos, animators!

Overall: life-like characters that grow throughout the series; life-like situations; incredible animation; dazzling battles; and (most importantly), the most wonderful music for a cartoon ever.

Rating: 10 out of 10. The battle music still makes my neck hair stand up...

14 of 14 people found this review helpful.  Was this review helpful to you?

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