| Ep # | Title | |------|-------| | 27 | Ben 10,000 | Future Ben | | 28 | Midnight Madness | | 29 | A Change of Face | | 30 | Merry Christmas | | 31 | Ben 10 vs. the Negative 10: Part 1 | | 32 | Ben 10 vs. the Negative 10: Part 2 | | 33 | The Return | | 34 | Be Afraid of the Dark | Zs’Skayr finale | | 35 | The Visitor | | 36 | Divided We Stand | | 37 | Don’t Drink the Water | | 38 | Big Fat Alien Wedding | | 39 | Ben 10: Secret of the Omnitrix (movie) |
: 18, 24, 26. Season 3 – The Negative 10 & New Aliens (Episodes 27–39) Ben unlocks new aliens (Cannonbolt, Wildvine, Upchuck, Ditto, Eye Guy, Way Big). ben 10 episodes
| Ep # | Title | Key Alien Debut | |------|-------|----------------| | 1 | And Then There Were 10 | Heatblast, Wildmutt, Diamondhead, XLR8, Grey Matter, Four Arms, Stinkfly, Ripjaws, Upgrade, Ghostfreak | | 2 | Washington B.C. | – | | 3 | The Krakken | – | | 4 | Permanent Retirement | – | | 5 | Hunted | – | | 6 | Tourist Trap | – | | 7 | Kevin 11 | Kevin Levin (mutant) | | 8 | The Alliance | – | | 9 | Last Laugh | – | | 10 | Lucky Girl | Gwen as "Lucky Girl" | | 11 | A Small Problem | – | | 12 | Side Effects | – | | 13 | Secrets | Master Control, Vilgax | | Ep # | Title | |------|-------| |
: Episodes 1, 7, 13. Season 2 – Ghostfreak Arc (Episodes 14–26) Focuses on Zs’Skayr (Ghostfreak’s true form) escaping the Omnitrix. Season 3 – The Negative 10 & New
| Ep # | Title | |------|-------| | 14 | Truth | | 15 | The Big Tick | | 16 | Framed | | 17 | Gwen 10 (non-canon alternate timeline) | | 18 | Grudge Match | Kevin returns | | 19 | The Galactic Enforcers | | 20 | Camp Fear | | 21 | Ultimate Weapon | | 22 | Tough Luck | | 23 | They Lurk Below | | 24 | Ghostfreaked Out | Zs’Skayr escapes | | 25 | Dr. Animo & the Mutant Ray | | 26 | Back with a Vengeance | Vilgax & Kevin team up |
