Saison 1 (1999) : The Big O - 13 épisodes (01 à 13)
| N° | |
| 1 | Roger the Negotiator |
| 2 | Dorothy, Dorothy |
| 3 | Electric City |
| 4 | Underground Terror |
| 5 | Bring Back my Ghost |
| 6 | A Legacy of Amadeus |
| 7 | The Call from the Past |
| 8 | Missing Cat |
| 9 | Beck Comes Back |
| 10 | Winter Night Phantom |
| 11 | Daemonseed |
| 12 | Enemy as Another Big ! |
| 13 | R.D. |
Saison 2 (2003) : The Big O II - 13 épisodes (14 à 26)
| N° | |
| 14 | Roger the Wanderer |
| 15 | Negotiation with the Dead |
| 16 | Day of the Advent |
| 17 | Leviathan |
| 18 | The Greatest Villain |
| 19 | Eye Witness |
| 20 | Stripes |
| 21 | The Third Big |
| 22 | Hydra |
| 23 | Twisted Memories |
| 24 | The Big Fight ! |
| 25 | The War of the Paradigm City |
| 26 | The Show Must Go On |
