Ranked #1331
The Big O

The Big O

Alternative Titles

English: The Big O
Synonyms: Big O Roger, Big O
Japanese: THEビッグオー


Type: TV
Episodes: 26
Status: Finished Airing
Aired: Oct 13, 1999 to Mar 27, 2003
Duration: 24 min. per episode
Rating: PG-13 - Teens 13 or older
L represents licensing company


Score: 7.571 (scored by 17314 users)
Ranked: #13312
Popularity: #1024
Members: 35,791
Favorites: 446
1 indicates a weighted score. Please note that 'Not yet aired' titles are excluded.
2 based on the top anime page. Please not that 'Not yet aired' and 'R18+' titles are excluded.

Popular Tags

action mecha sci-fi


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...


No background has been added for this series yet.

Related Anime

Adaptation: The Big O

Characters & Voice Actors

Wayneright, R. Dorothy
Wayneright, R. Dorothy
Yajima, Akiko
Yajima, Akiko
Smith, Roger
Smith, Roger
Miyamoto, Mitsuru
Miyamoto, Mitsuru
Burg, Norman
Burg, Norman
Kiyokawa, Motomu
Kiyokawa, Motomu
Rosewater, Angel
Rosewater, Angel
Shinohara, Emi
Shinohara, Emi


Katayama, Kazuyoshi
Katayama, Kazuyoshi
Director, Episode Director, Script, Storyboard, Screenplay
Tsuruoka, Yota
Tsuruoka, Yota
Sound Director
Nakamura, Kenji
Nakamura, Kenji
Episode Director
Okamoto, Hideki
Okamoto, Hideki
Episode Director, Storyboard

Add episode Episodes

Episodes  0 / 26
Aired  Oct 13, 1999 to Mar 27, 2003
Status  Finished Airing
No data, yet..

Write a review | More reviewsReviews

Feb 27, 2008 9:46 PM
BIG O was a unique show, with a good concept. Having everyone in the worlds memories erased and no one knows what happened, but everyone has clued inside of their minds. It reminds me a little of the movie DARK CITY. It had a nice twist on the Giant Robot anime, instead focusing on the characters and story. The story was great, you couldn't stop watching. All the twists and turns along the way in search of the what happened forty years ago. The story and characters were the best part of the show. The music was great, the animation was pretty good, and the read more
I found this review Helpful  Not Helpful
Apr 23, 6:21 PM
"We have choices. Some people like to stand in the rain without an umbrella. That's what it means to live free." - Roger Smith.

The Big O is a show that knows exactly what it wishes to accomplish. The focus of the show slowly, slowly culminates, and it ends. The little details make sense in retrospect; while the confusing elements slowly fade into the back of your mind as the larger picture comes into play and the new perspective takes over. Disappointingly, for such a grandiose effort, it ultimately fails to leave read more
I found this review Helpful  Not Helpful
Nov 18, 2007 2:23 PM
Yes, I understand I'm again writing a very excellent review from this one, I did dock it one for art because there were some slight animation issues in some parts of the show. But really I did enjoy this show.

First of all, if you are a mecha fan, you may be sorely dissapointed with this show, it has much more of a mystery feel to it and the Mecha fights may not be to your liking.

However, if your not a hard-core mecha fan like me but can appreciate the art-form of Mecha, you will likely enjoy this.

The main reason I love this show was because read more
I found this review Helpful  Not Helpful
Oct 18, 2008 11:37 AM
This is one of my most favorite animes, I'm not huge on mecha as most series ive seen seem to be about a buncha teens in the future trying to save the world (altho another exception to that is eureka seven, which oddly is a buncha teens in the future trying to save the world >_> but thats besides the point)

anyways, its basically about a negotiator named roger smith that pilots the big freaking mecha, big o. later on he gets swept up in all of this espionage and secrets and whatnot.

the first season is mostly stand alone episodes roger gets hired as a read more
I found this review Helpful  Not Helpful


Anime: Neon Genesis Evangelion
If you like surreal shows about giant robots in a dreary, post-apocalyptic setting, ho boy, have I got the show for you. 
reportRecommended by Masterminded
Anime: Giant Robo the Animation: Chikyuu ga Seishi Suru Hi
The 90s Giant Robo was a major influence on The Big O, particularly an inspiration for the emphasis on the weight and size of the robots and for the latter show's retro-futuristic urban setting. (Kazuyoshi Katayama, The Big O's director, did storyboarding and animation direction work for some episodes of Giant Robo.) If you enjoy the action in one you're likely to enjoy the other. 
reportRecommended by Kolokotronis
Anime: Cowboy Bebop
It's futuristic in nature and has the same "overcast", melancholly tone to it. The characters are increadibly similar to eachother;

Spike Spiegel and Roger Smith (both voiced by Stephen Blum in English) are both cool and collected characters with beloved allies that annoy them to no end.

Faye Valentine and Angel (both voiced by Wendee Lee in English) are both selfish women looking to restore their lost memories and who become unwillingly in love with the main character.

Both fantastic. 
reportRecommended by Neite
Anime: Ergo Proxy
Both shows are set in bubble cities in the near future and have some dark vibes. While Ergo Proxy doesn't have mechs, its does still have some action packed combat. More importantly the characters in both stories delve deeper in the history and dark past of the bubbles cites to reveal some big secrets. 
reportRecommended by ilikewhiterice
Anime: Kishin Houkou Demonbane (2006)
Noir-Style Setting, mechas fighting and protagonist doing detective-y work. 
reportRecommended by ariapokoteng
Anime: Kaiketsu Jouki Tanteidan
Both series have mechs except that Big O is bigger. Both main characters have butlers and female assistants. Both have a noir atmosphere. 
reportRecommended by xxxholic_wing

Opening Theme

#1: "Big-O!" by Rui Nagai (3-13)
#2: "Respect" by Sahashi (15-20, 22-25)

Ending Theme

"And Forever..." by Robbie Danzie with Naoki Takao

Recent News

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Recent Forum Discussion

Poll: Big O Episode 26 Discussion
gohdan - Mar 23, 2011
19 replies by 10th_man_down »»
May 29, 5:48 PM
Poll: Big O Episode 8 Discussion
gohdan - Feb 28, 2011
4 replies by glassthroat »»
May 28, 5:17 PM