Episodes cast for
"Ben 10: Alien Force" (2008) More at IMDbPro »

Season: 1 | 2 | 3
Year: 2008 | 2009 | 2010


Season 1


Season 1, Episode 1: Ben 10 Returns, Part One

18 April 2008
Having enjoyed a normal life for several years, Ben dons the Omnitrix once again when Grandpa Max suddenly goes missing.

Season 1, Episode 2: Ben 10 Returns, Part Two

18 April 2008
As Ben adjusts to the new Omnitrix, the team searches for clues to the alien plot on Earth hoping to find Grandpa Max.

Season 1, Episode 3: Everybody Talks About the Weather

26 April 2008
A signal from Kevin's Plumber badge leads Ben's team to a cornfield where local police pursue a Pyronite-human hybrid they blame for crop circles and recent area fires.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)
Zeno Robinson ... Alan Albright / Heatblast (voice)

Dee Bradley Baker ... Swampfire / Jet Ray / Officer Wells (voice)

Richard McGonagle ... DNAlien / Officer (voice)

Kevin Michael Richardson ... Sheriff Mason (voice)

Season 1, Episode 4: Kevin's Big Score

3 May 2008
While making repairs to the Rustbucket, Kevin steals it. He plans to use it as collateral for some other technology, but it gets stolen from him. Ben and Gwen go after Kevin.

Season 1, Episode 5: All That Glitters

10 May 2008
In seeking the offspring of Plumbers, Ben's team comes upon a suave bio-energy vampire who feeds on high school girls.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... ChromaStone / Humungousaur / Jet Ray (voice)

Paul Eiding ... Max Tennyson / Truck Driver (voice)
Kim Mai Guest ... Lucy / Zombie Girls (voice)
Kamali Minter ... Trina / Zombie Girls (voice)

Wil Wheaton ... Mike Morningstar (voice)

Season 1, Episode 6: Max Out

17 May 2008
Ken, Gwen's brother, stops in a small town for engine repairs and disappears. Grandpa Max arrives first to find him, Ben and the others soon after. They learn more about the alien conspiracy, and a heavy price will be paid to stop it.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Jet Ray / Humungousaur / Big Chill (voice)

Will Friedle ... Ken Tennyson / Shem (voice)

Paul Eiding ... Max Tennyson / Moe (voice)

Richard McGonagle ... DNAlien Interrogator / HighBreed / DNAlien #2 (voice)

Diane Delano ... Edna / DNAlien #1 (voice)

Season 1, Episode 7: Pier Pressure

31 May 2008
Ben goes out on a date. All does not go as well as he'd like when objects start attacking him and he's forced to go hero to protect himself, all the while trying to keep his secret from his date.

Season 1, Episode 8: What Are Little Girls Made Of

7 June 2008
While visiting Grandpa Max's favorite fishing hole along with Kevin, Ben and Gwen encounter a sorceress - their paternal grandmother.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Spidermonkey / Jet Ray / Brainstorm (voice)

Barbara Bain ... Human Verdona (voice)

Juliet Landau ... Natalie Tennyson / Verdona Tennyson (voice)

George Newbern ... Frank Tennyson (voice)

Season 1, Episode 9: The Gauntlet

14 June 2008
School bully Cash acquires some alien tech that Kevin kept as a souvenir in his car, which transforms Cash into a bully with whom only Ben can reckon.

Season 1, Episode 10: Paradox

5 July 2008
An abandoned military base leads to an encounter with a self-proclaimed hero and a mysterious creature that ages people and objects. The team must stop the creature and help the hero who claims they've met before and will meet again.

Season 1, Episode 11: Be-Knighted

12 July 2008
A dragon escapes from the Forever Knights, and they ask Ben for help tracking down/killing the beast. The team learns why the Knights were formed. The hunt for the dragon reveals other surprises.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... ChromaStone / Spidermonkey / Knight / Humungousaur (voice)

Jonny Rees ... Squire (voice) (as Greg Ellis)

Michael York ... Patrick (voice)

Hakeem Kae-Kazim ... Connor (voice)

Clancy Brown ... Dragon / Pilot (voice)

Season 1, Episode 12: Plumbers' Helpers

19 July 2008
Two Plumber offspring are taking down all aliens. Now they have their sites set on Ben's team, forcing the team to fight two of Ben's old alien forms - Four Arms and XLR8.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Big Chill / Swampfire / Fleeing DNAlien (voice)

Juliet Landau ... Helen (voice)

Khary Payton ... Manny (voice)

Adam Wylie ... Pierce (voice)

Season 1, Episode 13: X = Ben + 2

31 August 2008
When an alien emperor deems to destroy Earth due to the disappearance of his daughter, Ben must use Alien X to restore order, but not everything goes according to plan.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Seven Seven / Bandaged Warrior / Swampfire (voice)

Vicki Lewis ... Serena (voice)

Tara Strong ... Princess Attea (voice)

James Arnold Taylor ... Raff / Attendant #1 (voice)

Kevin Michael Richardson ... Emperor Milleous / Warrior #1 (voice)

Kevin Conroy ... Bellicus / Warrior #2 (voice)

Season 2


Season 2, Episode 1: Darkstar Rising

10 October 2008
The team is confronted by a Plumber Magister who accuses them of impersonating Plumbers. Meanwhile, a new foe allies himself with a HighBreed commander.

Season 2, Episode 2: Alone Together

17 October 2008
During battle, Ben and a HighBreed commander are teleported to a distant world. They must put their differences aside if they're going to have any chance of finding a way to return to Earth.

Season 2, Episode 3: Good Copy, Bad Copy

24 October 2008
Following up on reports of Ben having nightly activities, Kevin and Gwen discover what might be described as Ben's evil twin.

Yuri Lowenthal ... Ben Tennyson / Albedo Ben (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Humungousaur / Big Chill / Jet Ray / Swampfire / Goop / Echo Echo / Brain Storm / Spidermonkey / ChromaStone (voice)
Vyvan Pham ... Julie Yamamoto (voice)

Robert David Hall ... Forever Knight #3 / Counterman (voice)

Jeff Bennett ... Azmuth (voice)

Jonny Rees ... Forever Knight #1 / Forever Knight #2 / Jailer (voice) (as Greg Ellis)

Season 2, Episode 4: Save the Last Dance

7 November 2008
When Gwen demands that Kevin take her to her school's summer dance, Ben offers Kevin good advice. Meanwhile, Ben and Julie contend with a malfunctioning Omnitrix and a rogue Big Chill.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin / Teenager (voice)

Dee Bradley Baker ... Big Chill / Cop #1 / Driver (voice)
Vyvan Pham ... Julie Yamamoto / Waitress (voice)

Season 2, Episode 5: Undercover

14 November 2008
When the team turns to Cooper to get Kevin's transporter device working properly, they find their young friend has been abducted. Finding him leads to a well-hidden DNAlien base.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Swampfire / DNAlien #1 / Goop / Echo Echo (voice)

Kevin Michael Richardson ... DNAlien #2 / Guard #1 / Beefy Trucker (voice)

Richard McGonagle ... Guard #2 / HighBreed / Sheriff (voice)
Corey Padnos ... Cooper (voice)

Season 2, Episode 6: Pet Project

21 November 2008
The Forever Knights develop a ship they will use to travel to the dragon's home world to destroy all dragons. To make it fully functional, they capture Ship, the alien Upgrade pet Ben and Julie met.

Yuri Lowenthal ... Ben Tennyson / Brad (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin / Rubber Suit Alien (voice)

Dee Bradley Baker ... Swampfire / Jet Ray / Driver (voice)

Kevin Michael Richardson ... TV Narrator / Sir Morton / Forever Knight #1 / Big Ship (voice)

Tim Curry ... Dr. Joseph Chadwick / Forever Knight #2 (voice)
Vyvan Pham ... Julie Yamamoto / Ship / Ingenue (voice)

Season 2, Episode 7: Grounded

23 November 2008
What would happen if Ben's parents found out about his anti-DNAlien exploits and Omnitrix adventures? He's about to find out.

Season 2, Episode 8: Voided

5 December 2008
Helen of the Plumbers' Helpers calls Gwen, pleading for help, so Ben goes into the Null Void alone to assist her, finding an old enemy with new powers - and other surprises.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Dirt Farmer / Humungousaur / Big Chill / Brainstorm / ChromaStone (voice)

Paul Eiding ... Max Tennyson / Alien Serf (voice)

Dwight Schultz ... Null Void Guardian / Dr. Animo (voice)

Khary Payton ... Manny (voice)

Juliet Landau ... Helen (voice)

Adam Wylie ... Pierce (voice)

Season 2, Episode 9: Inside Man

12 December 2008
Tyler, a man fighting against DNAlien programming, struggles to regain lost memories and convince local authorities of a hostile alien presence.

Yuri Lowenthal ... Ben Tennyson / Driver / Omnitrix (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin / DNAlien #5 (voice)

Dee Bradley Baker ... ChromaStone / Humungousaur / Jet Ray / DNAlien #1 / Xenocyte (voice)

Wallace Langham ... Tyler / DNAlien #2 (voice)

Richard McGonagle ... HighBreed / Desk Sergeant / New Cop (voice)

Paul Eiding ... DNAlien #3 / DNAlien #4 (voice)

Season 2, Episode 10: Birds of a Feather

24 March 2009
Ben decides to help an arachnachimp on his lunar quest for a crystal.

Season 2, Episode 11: Unearthed

25 March 2009
The team hears of a creature on nightly rampages in the desert and investigates. They find the creature, and some DNAliens.

Yuri Lowenthal ... Ben Tennyson / DNAlien #3 (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Hideous Monster / Echo Echo / Humungousaur / ChromaStone / DNAlien #1 / Alien Mom (voice)

Jeff Bennett ... DNAlien #2 / Alien Dad (voice)

Season 2, Episode 12: War of the Worlds: Pt. 1

27 March 2009
Paradox and Azmuth arrive with grave news: The DNAliens are ready to make their move. While Gwen and Kevin gather help, Azmuth reveals some secrets of the Omnitrix and its true purpose.

Season 2, Episode 13: War of the Worlds: Pt. 2

27 March 2009
Though Ben's team fails to stop the DNAlien Fleet from arriving, re-enforcements arrive, but this battle can't be won on Earth. A small group goes to the DNAlien home world to force its leaders to stop the invasion.

Season 3


Season 3, Episode 1: Vengeance of Vilgax: Pt. 1

11 September 2009
Vilgax has beaten the heroes of ten planets and taken their powers as his own. Now he's looking for Ben.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Ssserpent / Jet Ray / Cannonbolt / Psyphon / Policeman #1 (voice)

Jeff Bennett ... Azmuth / Ultimo (voice) (as Jeff Glen Bennett)

Khary Payton ... TV Announcer / Manny (voice)

Paul Eiding ... Lukik / Max Tennyson (voice)

Juliet Landau ... Tini / Helen (voice)

James Remar ... Vilgax (voice)

Season 3, Episode 2: Vengeance of Vilgax: Pt.2

11 September 2009
After their attempt to hack into the Omnitrix fails, the team must track down some of Ben's transformations that escaped before he must face Vilgax in a one-on-one battle for the fate of the Earth.

Season 3, Episode 3: Inferno

17 September 2009
Grandpa Max asks the team to investigate some strange desert activity, leading them to encounter Vulkanus and his incendiary plans for Earth's future.

Yuri Lowenthal ... Ben Tennyson / Patrolman (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Paul Eiding ... Max Tennyson / Mouldywarp (voice)

Dee Bradley Baker ... Pyroxovore #1 / Brainstorm / Big Chill / Spidermonkey / Jet Ray (voice)

John DiMaggio ... Worker / Vulkanus (voice)

Season 3, Episode 4: Fool's Gold

25 September 2009
Alien Spring Break at a town's Popcorn Festival occurs every 17 years. When one alien goes missing, Max sends the team to find the wayward alien.

Yuri Lowenthal ... Ben Tennyson / Alien #2 / Orb (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin / Happy Alien (voice)

Dee Bradley Baker ... Last Alien / Spidermonkey / Goop / Decka / Big Chill / Echo Echo (voice)

Paul Eiding ... Max Tennyson / New Alien / Chair Alien (voice)

Brian George ... Mayor Coleman / Alien #3 (voice)

Season 3, Episode 5: Simple

9 October 2009
An alien girl asks for Ben's help to end a war that's lasted for years.

Yuri Lowenthal ... Ben Tennyson / Radio Announcer (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Jet Ray / Lodestar / Spidermonkey / Way Big / Swampfire / Goop (voice)
Vyvan Pham ... Ship / Probity (voice)

Alexander Polinsky ... Argit (voice)

Jeff Bennett ... Blue Leader / Red Leader (voice) (uncredited)

Season 3, Episode 6: Vreedle, Vreedle

16 October 2009
Ship's owner decides he wants him back and hires some repo men to retrieve him. Ben and Kevin go to court to take care of things legally, leaving Gwen and Julie to face the repo men.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Jet Ray / Echo Echo / Humungousaur / Goop / HighBreed Bailiff (voice)

Rob Paulsen ... Baz-El / Rhomboid Vreedle (voice)

John DiMaggio ... Octagon Vreedle / Judge Domstol (voice)
Vyvan Pham ... Ship / Julie Yamamoto (voice)

Season 3, Episode 7: Singlehanded

23 October 2009
A retriever who specializes in obtaining rare goods comes after the Omnitrix, dimensionally separating the Omnitrix and a part of Ben. Ben is sent elsewhere, fighting to survive, while his friends try to figure a way to bring him back.

Season 3, Episode 8: If All Else Fails

6 November 2009
A sleeper Highbreed awakens, unaware of the war's resolution, he begins his failsafe mission to destroy the Earth.

Season 3, Episode 9: In Charm's Way

13 November 2009
Charmcaster wants payback from Gwen. She plots to steal Kevin away from Gwen.

Season 3, Episode 10: Ghost Town

20 November 2009
Ghostfreak, loosed, takes over Vilgax's planet, leaving Vilgax to turn for help to only person who has defeated Ghostfreak before - Ben.

Yuri Lowenthal ... Ben Tennyson / Omnitrix (voice)

Ashley Johnson ... Gwen Tennyson / Mom Alien / Alien Girl (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Humungousaur / Swampfire / Moley (voice)

Jeff Bennett ... Security Alien #2 / Ghostfreak (voice) (as Jeff Glen Bennet)

James Remar ... Security Alien #1 / Vilgax (voice)

Season 3, Episode 11: Trade Off

4 December 2009
Kevin tracks down Darkstar. Darkstar asks for Kevin's help to retrieve an item that could cure both of them.

Season 3, Episode 12: Busy Box

11 December 2009
The team investigates some highly advanced alien technology. They find a box that is more advanced than the Omnitrix. Others desire this technology.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Humungousaur / Swampfire / Amalgamation Robot / Lodestar / Spidermonkey (voice)

John DiMaggio ... Octagon Vreedle (voice) (as John Dimaggio)

Rob Paulsen ... Rhomboid Vreedle (voice)
Diane Michelle ... Cosmic Mom (voice)

Season 3, Episode 13: Con of Rath

8 January 2010
An alien race asks the team to deliver the Tiffin to another race as a peace offering. The Omnitrix changes Ben into a new form that's highly aggressive, which causes other problems on their peace mission.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson / Cicely (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Tiffin / Zaw-Veenull / Commander Sangfroid (voice)

John DiMaggio ... Octogon Vreedle / Vulkanus / Rath (voice) (as John Dimaggio)

Alexander Polinsky ... Argit / Jarett (voice)

Rob Paulsen ... Rhomboid Vreedle (voice)

Season 3, Episode 14: Primus

15 January 2010
An undisclosed connection between the Omnitrix and the planet Primus teleports Ben and team to the hidden planet when it comes under threat.

Yuri Lowenthal ... Ben Tennyson / Omnitrix (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Lodestar / Cannonbolt / Way Big / Psyphon (voice)

Jeff Bennett ... Azmuth / Ghostfreak (voice) (as Jeff Glen Bennett)

James Remar ... Vilgax / Vilgax Goop (voice)

Season 3, Episode 15: Time Heals

22 January 2010
Gwen travels back in time to prevent Kevin and Ben from hacking the Omnitrix. Her actions have unexpected consequences.

Yuri Lowenthal ... Ben Tennyson / Captive #1 (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Spidermonkey / Swampfire / Rock Monster #1 (voice)

Kari Wahlgren ... Charmcaster (voice)

Khary Payton ... Hex (voice)

David McCallum ... Professor Paradox (voice)

Season 3, Episode 16: The Secret of Chromastone

29 January 2010
A celestial alignment and the true function of a power shard leads Tetrax to throttle ChromaStone right out of Ben Tennyson for a time-sensitive assignment.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson / Mr. Smoothy Girl (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Diamondhead / ChromaStone / Humungousaur / Jet Ray / Echo Echo / Sugilite (voice)

Dave Fennoy ... Tetrax (voice)

James Remar ... Vilgax (voice)

Season 3, Episode 17: Above and Beyond

12 March 2010
The Plumbers' Helpers receive a distress call from Max, followed by a threatening message from Ben to not interfere. Something's wrong, and the Helpers must face off against their hero Ben.

Yuri Lowenthal ... Ben Tennyson (voice)

Dee Bradley Baker ... Goop / Big Chill / Humungousaur / Echo Echo (voice)

Paul Eiding ... Max Tennyson (voice)

John DiMaggio ... Rath / Computer Voice (voice)

Juliet Landau ... Helen (voice)
Zeno Robinson ... Alan Albright (voice)

Adam Wylie ... Pierce (voice)

Khary Payton ... Manny (voice)

Season 3, Episode 18: Vendetta

19 March 2010
Ragnarok, the villain who killed Kevin's father, is out to complete the mission he started years ago. Kevin is determined to stop him and get revenge.

Yuri Lowenthal ... Ben Tennyson (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Diamondhead / Lodestar / Forever Knight Leader (voice)

Paul Eiding ... Max Tennyson (voice)

John DiMaggio ... Ragnarok / Rath (voice)

Pamela Adlon ... Kevin's Mom (voice)

Ioan Gruffudd ... Devin Levin / Robot Guard (voice)

Season 3, Episode 19: The Final Battle: Part 1

26 March 2010
Vilgax and Albedo team up to defeat Ben, with Albedo armed with Azmuth's latest creation - the Ultimatrix.

Yuri Lowenthal ... Ben Tennyson / Albedo / Omnitrix / Kenko (voice)

Ashley Johnson ... Gwen Tennyson (voice)

Greg Cipes ... Kevin Levin (voice)

Dee Bradley Baker ... Diamondhead / Big Chill / Jet Ray / Swampfire / Spidermonkey / Humungousaur / Ultimate Humungousaur (voice)

Paul Eiding ... Ishyama / Max Tennyson (voice)

Jeff Bennett ... Azmuth / Policeman / Kraab (voice) (as Jeff Glen Bennett)
Vyvan Pham ... Ship / Myaxx (voice)

James Remar ... Vilgax (voice)

Season 3, Episode 20: The Final Battle: Part 2

26 March 2010
Ben's team faces its greatest challenge - taking on Vilgax without the Omnitrix.

You may add a new episode for this TV series by clicking the 'add episode' button