The following is a list of episodes for the original Ben 10 series. There are a total of 49 episodes. three movies, 10 shorts, and one special. The series was produced as two seasons with 26 episodes each[note 1] but written and aired as four seasons. Several episodes aired out of order.
This article is about the Ben 10 episodes in the intended order. You might have been looking for the production order, or the U.S. airing order.
While stopped at a lakefront campsite, Ben has a chance encounter with a Loch Ness type sea monster called a Krakken, provoked by an evil poacher.[CN 2][revised]
Ben catches a cold and the symptoms wreak havoc on his alien heroes. To make matters even worse, he has to battle a villain who controls insects.[CN 4][revised]
Grandpa Max's mysterious past comes to light when Vilgax shows up on Earth in search of the Omnitrix. And the family must work together to defeat him.[CN 5]
When Max finds out that part of a Mayan weapon has been unearthed in Texas, he becomes obsessed with finding it. In doing so, he leads Ben and Gwen on a wild adventure.[CN 6][revised]
Gwen's Lucky Girl powers return when she buys a magical stone at a magic convention in Las Vegas. However, Hex is after the same stone, and after his niece breaks him out of prison, the two set off to retrieve the stone.
Max's old friend has built the world's only underwater resort, and Ben, Gwen and Max are invited for a sneak peek. But it turns out in order to power the resort, Max's friend took an energy orb from a race of underwater aliens. Now, the aliens want their energy orb back and destroy the resort in order to get it.
Dr. Animo has broken out of jail, and has been tracking down Ben, intent on revenge. At the same time, Ben's broken off a piece of the Omnitrix, and as a result, has turned into weird alien combinations, e.g. Stink Arms.
Ben's feeling cocky with the watch. He's unlocked its secret, and now can become any alien he wants, whenever he wants. That's the good news. The bad news is, after finding one another in the depths of space, Kevin 11 and Vilgax have teamed up and have returned to Earth to destroy Ben and get the Omnitrix.
When the Rustbucket breaks down outside the largest mall in the U.S., it seems Ben and Gwen will have the time of their lives in the mall. That is until they run into an evil hypnotist entertaining the crowd, who puts Ben under hypnosis, causing him to sleepwalk at night and help him steal things. And when the hypnotist discovers certain aliens are now helping him, he exploits them for his grand plan of hypnotizing hundreds of people so they'll be under his demented control forever. Ben must figure out how to break the spell he's under and stop this evil plan.
Ben gets sucked into the future by a grown up Gwen. His mission is to help the now all powerful and adult Ben 10,000 seemingly defeat the future versions of Dr. Animo and Vilgax. However, the real reason Ben has been brought to the future is to teach his adult self some humility and the fact he's lost touch with Max and has forgotten what's really important, family.
In Salem Massachusetts, Ben, Gwen and Max once again go up against Charmcaster, whose goal is to switch souls with Ben and possess the Omnitrix. However, Charmcaster first accidentally switches identities with Gwen, and then as spells fly back and forth, Ben and Gwen even end up in one another's bodies before they team up to get rid of Charmcaster once and for all.
When the Rustbucket's A/C goes on the fritz in the middle of the desert, Ben, Max and Gwen take refuge at Holiday Village, an over-the-top Christmas theme park that seems to appear out of nowhere. The place is run by an evil entity known as Mr. Jingles, who takes Max prisoner because he believes Max is Santa! It's up to Ben and Gwen to free Max and break the spell Mr. Jingles has cast on Holiday Village, freeing others who've been trapped there for years and releasing the theme park.
In Arizona, Max stops to visit an old friend, who's a Navajo Chief. Suddenly, a powerful storm comes out of nowhere. And behind bolts of purple lightning, a Navajo werewolf appears. As Ben battles the werewolf, he appears to be bitten and turns into Benwolf.[CN 7][revised]
When Ben, as Upgrade, and Gwen get zapped into a Sumo Slammersvideo game, Ben soon has to deal with Gwen's superior gaming skills, while he also tries to impress his video icon in the game.
Max takes the kids to a drought-stricken Chicago to see his favorite golden oldie band perform at a huge music festival. Once there, our heroes cross paths with a deranged weatherman.
Ben thinks he's having 'the perfect day' only to realize he's been put in a dream world by Enoch and the Forever Knights who are after the Omnitrix. Ben's "dream world" soon becomes a nightmare world, with Ben forced to live out his ultimate terror, being stuck at school! But with Max and Gwen's help, he's able to vanquish his nightmare foes and re-enter the real world where he takes down Enoch, only to reveal an even more powerful knight, the Forever King.
While at the beach, Ben discovers a new hero, Ditto, and soon has the ability to create multiple Dittos at once. These multiple Dittos can't agree on anything and drive Gwen crazy. However when the chips are down, these Dittos come together as one fighting force in order to defeat Animo and his army of replicant Stinkflies.
In Florida, Ben and Max accidentally come in contact with water from the Fountain of Youth. As a result, Max transforms into a kid and Ben a toddler, with Gwen having to deal with both of them. Our trio then must track down Hex who's found the source of the fountain and prevent him from drinking the water that will make him immortal and unstoppable.
Ben and Gwen accompany Max to a wedding, which doesn't make Ben particularly happy, especially given the fact he has to wear a tux and learn how to dance. It's revealed that the bride's parents are aliens while the groom's family are ex-Plumbers. It turns out the bride's parents are out to sabotage the wedding because of a long-lasting feud with the Plumbers, and take action by demonstrating their destructive powers and causing deadly havoc. Ben, Max and Gwen enter the fray and not only save the day, but make sure the ceremony goes on as planned.[CN 8][revised]
Out on a desert highway, a group of modern day highway pirates hijack the Rustbucket, trick it out and use it in a daring robbery. And while Ben and Gwen are at first glad to get rid of that "bucket of bolts", they come to realize the Rustbucket is "a part of the family". In the end our trio of heroes get Max's beloved "ride" back and bring down these pirates once and for all.
After Ben thinks he's broken Gwen's computer, he sneaks off and enters an "ultimate wrestling competition" to win enough money to buy her a new one. On the mat as Four Arms, he becomes an instant celebrity hit with the fans and ends up going up against a tandem of odd-looking brothers with special mutant-like powers. Initially adversaries, Ben and the brothers become allies when Ben discovers the brothers are beholden to a powerful mob boss. Ben helps the brothers defeat the mob boss and his henchmen, and in the end realizes Gwen's computer was never really broken.
We're back in the future with Ben 10K, and this time he has a son, Ken. On Ken's tenth birthday, Ben gives him his very own Omnitrix. Ben must come to learn to trust Ken with the power of the Omnitrix. Along the way, Ken befriends a kid named Devlin. Devlin turns out to be Kevin 11's son and was merely using Ken so he could break his dad out of the Null Void. Ben 10K and Ken then team up to take down Kevin 11. As for Devlin, he comes to realize his dad is a jerk, and realizes the error of his ways. He's able to redeem himself, proving he's a good kid and joining forces with "Team Tennyson."
Summer's over and Ben is back at school. Unable to tell anyone that's he all these cool aliens that they've heard about all summer, Ben suddenly realizes he's gone from a "hero" to a "zero", that is until Vilgax comes after him with a vengeance. Ben must now reveal his hero side to his parents and to his fellow classmates. In doing so he saves his town and teams up with his dad to destroy Vilgax once and for all. But there is some bad news... Gwen has switched schools and is in Ben's class!
Ben, Max, and Gwen investigate a couple of daring break-ins, only to discover they were both once secret Plumber installations. What our heroes find out is that those responsible for the break-ins are working for the Forever King. He's brought together a rogue's gallery of some of Ben's most notorious enemies to eventually steal the world's most powerful energy source... located deep inside the Plumber bunker at Mount Rushmore.
Ben, Max and Gwen put up an Alamo-like stand inside the bunker at Mount Rushmore and against great odds take down the Forever King's band of baddies. In the end, Ben goes Upchuck and digests the powerful energy source, preventing the Forever King from using it for nefarious purposes. However, this ultimate baddie is able to disappear... perhaps to return once again.
In a battle with Animo, Ben in hero mode doesn't listen to reason from Max and Gwen, and gets hit by a weird energy. Little does Ben know that the "self-destruct" function on the Original has just been initiated![CN 9][revised]
After fighting aliens with his Grandpa Max and cousin Gwen, Ben returns home to face his biggest challenge yet, just being a regular kid. Little does he know that under his hometown lies a secret, one that he must protect at any cost.
Ten-year-old Ben Tennyson is finally back from his summer vacation... and his life is a mess! Humiliated by his teacher, grounded by his parents, and cursed with a malfunctioning Omnitrix that's vaporizing his homework, Ben seizes an opportunity to "get away from it all" by exploring the galaxy with his alien buddy Tetrax. However, he quickly finds himself crashing back to Earth in alien form and unable to turn human again! To make matters worse, Ben soon encounters a deadly Mechamorph Warrior - just like Ben's Upgrade alien, but armed with explosive high-tech armor and a single-minded goal to destroy all aliens! As Grandpa Max, Gwen and Tetrax race to track him down, Ben's battle with the Mechamorph Warrior takes them to the Omniverse - a strange world that exists within the Omnitrix itself - and a deadly battle with an evil version of Ben's most powerful alien of all: the hundred-foot-tall Way Big! But little does Ben know that neither the Mechamorph Warrior nor the Evil Way Big are exactly what they seem!
Ben and Gwen's backseat bickering gives Grandpa Max a headache, forcing him to pull the Rustbucket into a truck stop in the middle of nowhere. While Grandpa goes off to search for aspirin, the squabble escalates into an all-out epic battle between Ben's Omnitrix and Gwen's magic. Though Gwen is able to fight Four Arms to a draw, things get tricky when Ben transforms into Upgrade and turns the Rustbucket into a robot![CN 11]
Notes[]
↑The first 26 episodes were numbered B001 to B026,[bg 1] and the following 26 episodes were numbered the same way.[bg 2]
↑Washington B.C. was produced as the first episode of the series,[bg 3] but And Then There Were 10 was made to be the first episode of the series, introducing the characters and setting, and laying the foundation of the series.