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Goodbye and Good Riddance

Full Episode

S 4 : Ep 13 - 4/15/08

With summer over, Ben goes back to school. Unable to tell anyone about the Omnitrix, Ben finds that regular life is much more boring than he imagined. However, the arrival of Vilgax promises to rectify that situation. Will Ben defeat Vilgax once more or does Vilgax have a plan to destroy Ben and the rest of his little town?moreless

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The Secret of the Omnitrix

Full Episode

S 4 : Ep 11 - 4/15/08

Ben is battling with Animo, and when he goes against the advice of Max and Gwen, he gets engulfed in a strange energy field. It turns out that the self destruct function of the Omnitrix has been accidentally set off. The function sends a signal that is heard by Tetrax, who comes to Earth and tells Ben that they must go through space to find Azmuth, the watchâ€™s creator and the only one who can stop the destruction.moreless

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Ben 10 vs. Negative 10 (2)

Full Episode

S 4 : Ep 11 - 3/9/08

Ben, Gwen, Cooper and Grandpa Max face their hardest battle ever against the villains led by the Forever King at Mount Rushmore. Both sides are fighting for the most powerful energy source in the universe! Will Ben and the gang win it or will The Negative Ten get to it first?moreless

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Ben 10 vs. Negative 10 (1)

Full Episode

S 4 : Ep 10 - 3/9/08

The Forever King sets his plan in motion and recruits 10 of the most powerful enemies left that Ben has ever faced in order to achieve his greatest goal. Will Ben, Gwen, and Max be able to fight off all ten of them, or will they finally take their revenge?moreless

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Ken 10

Full Episode

S 4 : Ep 8 - 10/6/07

In the future, Ben gives his son, Ken, an Omnitrix for his 10th birthday. However, Ben will have to learn to trust him with that power. Will Ken be responsible and mature enough to maintain its power, or will he create massive trouble for himself and his dad?moreless

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Ready to Rumble

Full Episode

S 4 : Ep 7 - 9/29/07

When Ben accidentally breaks Gwen's laptop, he participates in the "Ultimate Wrestling Competition" as Four Arms to get the prize money for a new laptop to replace Gwen's broken one. Can Ben win against all those mysterious contestants or will his plan change for the good of someone else?moreless

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Ben 4 Good Buddy

Full Episode

S 4 : Ep 6 - 9/22/07

While on a desert highway, the RV gets stolen by a group of modern-day pirates, who use it to go on a robbery.

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Big Fat Alien Wedding

Full Episode

S 4 : Ep 4 - 8/2/07

Ben, Gwen, and Grandpa Max attend a family wedding. Ben's Uncle Joel is to be married to his fiancée, Camille. It turns out that Camille is no ordinary human being, but the purpose of their marriage is to end the fighting between her alien race, the Sludges, with the Plumbers. Unfortunately her parents disapprove the marriage at the last minute and attack the family during the ceremony. Can Ben stop these wedding crashers, or will the aliens take over the wedding and Ben?moreless

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Don't Drink the Water

Full Episode

S 4 : Ep 3 - 7/26/07

After being in contact with water from the Fountain of Youth, Grandpa Max is reverted to being a kid again and Ben is back to being four years old. Now, Gwen is left to take care of them while stopping Hex from finding the fountain's source. Can she handle their actions and still be able to stop Hex, or is it too much for her to handle?moreless

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Divided We Stand

Full Episode

S 4 : Ep 2 - 7/19/07

Ben gains another Omnitrix hero to use, which he calls Ditto. Gwen can't stand being around the multiplying Dittos, and they end up giving her headaches. The Dittos, though, prove to be real helpful against Dr. Animo and his multiplying Stinkflies after he extracted some of Ditto's DNA.moreless

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Perfect Day

Full Episode

S 4 : Ep 1 - 7/14/07

Enoch and the Forever Knights return, putting Ben into a dream world where he's tricked into having the perfect day. However, his dream quickly turns into a nightmare. Will Ben find a way to escape this nightmare?moreless

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The Visitor

Full Episode

S 3 : Ep 13 - 4/21/07

While snowmobiling, two guys accidentally release an alien named Xylene from a strange container. At a park, Ben (as Wildmutt) steals Gwen's kite, so she casts a spell to make dogs attracted to him. Grandpa Max seems sad to be in St. Louis since it is where he met his wife. Xylene attacks, and Grandpa Max comes to defend, only to recognize her. Xylene reveals that she came to find the Omnitrix since she lost it when Vilgax attacked her ship. While Grandpa Max and Xylene talk about the past, a robot emerges from the area where Xylene was and attacks Ben and Gwen. The mechadroid attacks twice, taking Grandpa Max with him. Now Ben must work with Xylene (to his dismay) to save Grandpa Max. But Xylene has a secret weapon for Ben! Can Ben use this new weapon and defeat the mechadroid, or will he be doomed along with everyone else?moreless

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Be Afraid of the Dark (2)

Full Episode

S 3 : Ep 12 - 4/14/07

Ghostfreak's return spells disaster for our heroes. Grandpa Max and Gwen must deal with the mummy alien in space while Ben deals with Ghostfreak and Dr. Vicktor on Earth. Ghostfreak then reveals his master plan: he plans to blanket the Earth with Coronium so that sunlight will not reach the planet so that he may rule. With the power of a new alien in the watch, can Ben stop Ghostfreak, and save Grandpa and Gwen?moreless

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The Return (1)

Full Episode

S 3 : Ep 11 - 4/7/07

While driving on a Florida highway, a bus of escaped felons rams into the RV. Ben transforms into Stinkfly (though not intentionally) and tries to stop them. With a little help from Grandpa's handy driving, and a magic spell from Gwen, the felons are put back in jail. On the news, the Tennyson's hear about purple lightning delaying a space shuttle launch. Remembering the lightning from the encounter with the werewolf and mummy aliens, they head to Cape Canaveral. At the Space Center, Ben comes under attack by the werewolf and mummy aliens, and new Frankenstein alien. However, why is the purple lightning occurring, and what ties does it have to an old "friend"?moreless

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Monster Weather

Full Episode

S 3 : Ep 10 - 3/24/07

When Grandpa Max takes Ben and Gwen to a music festival, the weather is the last thing they're paying attention to. While Grandpa Max is excited to see his old-time favorite band, Shag Carpeting, Ben could care less. He's more worried about getting to a Sumo Slammer convention. But when the weather reporter's weather robot starts trying to take over the weather and changes it completely, there's trouble at the festival. With the weather being too dangerous, the bands can't play and the show can't go on. Now, it's up to Ben to try out some of his skills on the guitar and to see if he can make the show go on! What will the weather do, and is it too "stormy" for Ben to handle?moreless

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The Unnaturals

Full Episode

S 3 : Ep 9 - 3/17/07

While attending the Little League World Series to see his home team play, Ben discovers that the opponents are actually robots posing as kids. They also have plans to replace the President with one, as well. Ben has enough trouble arguing with the school bullies. Can he handle the power and numbers of the robots, too?moreless

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Under Wraps

Full Episode

S 3 : Ep 8 - 3/10/07

In order for Ben and Gwen to learn the value of hard work, Grandpa Max takes them to a farm. Meanwhile, an alien mummy arrives to uncover a rare and dangerous energy source. Will the group find the source before the new alien finds it or will the entire world crumble to the power of the new alien?moreless

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Super Alien Hero Buddy Adventures

Full Episode

S 3 : Ep 7 - 3/3/07

Ben's alien heroes are starring in a silly network cartoon called Super Alien Hero Buddy Adventures and his favorite action hero Kangaroo Commando has been pulled off the air by the same network, so Ben tries to get him back on television and get credit for the alien heroes.moreless

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Game Over

Full Episode

S 3 : Ep 6 - 2/24/07

The Tennysons stay in as it rains outside, and Ben plays a video game to pass the time by. When Gwen decides to join in, Ben is jealous of how she's a far superior player. Instead, Ben decides to transform to Upgrade, and merges with the game console. Gwen makes an attempt at shaking him off, but suddenly, a lightning strike causes them to transfer into the video game itself. The only way Ben can use the Omnitrix is to find coins with the different aliens on it. To get out, they must find the Upgrade coin before an evil being uses it to escape into the real world. Can Ben and Gwen defeat this villain, or will he escape and leave them trapped in there forever?moreless

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Benwolf

Full Episode

S 3 : Ep 5 - 2/17/07

Ben, as Wildvine, is fighting against an alien werewolf and is bitten. The Omnitrix times out and Ben turns back to his human form. Then, when the werewolf hits the Omnitrix, it starts to mess up and act weird. After all of this, Ben starts to get a crush on a girl that he meets. But things change, as Ben slowly starts to turn into a werewolf himself. What will happen? Will Ben remain a werewolf forever? If not, will he find another way to discover new aliens and add them to the Omnitrix?moreless

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Merry Christmas

Full Episode

S 3 : Ep 4 - 12/11/06

Ben, Grandpa Max, and Gwen come upon a bizarre Christmas theme park run by an evil entity who thinks Grandpa Max is Santa Claus and proceeds to trap him. What will this lead to? And can Ben save the day one more time?moreless

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A Change of Face

Full Episode

S 3 : Ep 3 - 12/9/06

Dressed as Pilgrims, to honor their history, while in the streets of Salem, MA, Ben, Gwen, and Grandpa Max witness an explosion of a nearby building. But when Ben rushes to the rescue, Charmcaster is there waiting with a spell to take over Ben's body and the Omnitrix. Only things go awry and Gwen and Charmcaster switch bodies. Gwen goes to prison and the sorceress is brewing a plan to gain the Omnitrix. Now Gwen must find the way to get out of prison, alert her family against Charmcaster, and get her own body back using every trick up her sleeve... or Charmcaster's.moreless

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Midnight Madness

Full Episode

S 3 : Ep 2 - 12/2/06

When Ben is hypnotized, he begins breaking the law while sleepwalking. Once the evil hypnotist called Sublimino discovers the aliens at his disposal, he plots to put hundreds of people under his control forever.moreless

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Ben 10,000

Full Episode

S 3 : Ep 1 - 11/25/06

When Gwen is abducted, Ben as XLR8 follows her abductor to the future where they discovered that her abductor is the future Gwen and they discover his future version of Ben and Grandpa Max. In the future, Dr. Animo revives Vilgax and plots to open the Null Void chamber. Both Bens must work together to stop them.moreless

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Back With a Vengeance

Full Episode

S 2 : Ep 13 - 10/9/06

The Megacruiser flies solo in space, and inside Kevin examines the giant ice block found in space. Inside the mass, held Vilgax, and Kevin underestimated his current situation. He was very much alive and well, and they soon create a partnership after learning that they were both after the same person. Will this partnership hold or crumble? On Earth, Ben plays around with the Omnitrix, hoping to find a better way of controlling it. Eventually, he finds the master control of the Omnitrix, giving him the ability to alternate between aliens, as well as prolong his duration with a form. Although his discovery has given him a stronger advantage, will it be enough to stop the danger that lies ahead? Can Ben prevail once more?moreless

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Dr. Animo and the Mutant Ray

Full Episode

S 2 : Ep 12 - 8/25/06

The Tennysons arrive at a swamp, where the festivities of Gatorfest start first thing the next day. Gwen finds Ben playing around with the Omnitrix, and she warns him that it may create unusual problems. Without heeding Max and Gwen's warning, he pops the face out, and the Omnitrix acts up. Right away, something was wrong, though it was gone unnoticed, at least, until the next day. Gator-fest was going along well, but the giant frog of Dr. Animo comes in to disrupt it. Dr. Animo has returned, and he wants to take revenge on Ben. But when Ben goes alien, he transforms into a hybrid alien with unbalanced attributes. Will Dr. Animo's mutants defeat the alien hybrids? Can Ben find a way to use the uncommon powers together of both aliens? Will Ben ever learn his lesson in listening for a change?moreless

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Ghostfreaked Out

Full Episode

S 2 : Ep 11 - 7/25/06

A terrorizing nightmare of Ghostfreak is half the trouble for an unnerved Ben. Ben wakes up and goes to a tour of an important academy that Gwen wishes to attend. It is disturbed by the Circus Freaks (Acid Breath, Frightwig, and Thumbskull). Ghostfreak leads all three of them. Will Ghostfreak defeat Ben in the dark or will Ben shed the light of his power?moreless

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They Lurk Below

Full Episode

S 2 : Ep 10 - 7/18/06

Our heroes ride a jet belonging to Grandpa Max's old Friend, Donovan Grand Smith, who owns an underwater resort. At the entrance, they receive a warm welcome from Donovan himself, though they also meet with his grandson, Edwin, who didn't seem to be excited about their guests. Later, when Edwin, Ben, and Gwen secretly enter the Undersea Manta Ray, a giant submarine, they encounter strange aliens that threatened to destroy the whole resort. The kids help each other, and Donovan gets closer to his grandson! Will the aliens destroy everything or will the group find a way to defeat all of them?moreless

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Tough Luck

Full Episode

S 2 : Ep 9 - 7/12/06

Hex's niece, Charmcaster, enters the underground prison he's held at to release him out of his cell. With her help, Hex was able to regain most of his powers after being given his magical staff. Meanwhile, Ben, Gwen, and Grandpa Max head to a magic convention held in Las Vegas, and in there, Gwen finds the legendary Keystone of Bazell. With it, she gains the powers of Lucky Girl once again, but will it last after finding out that Hex and his niece are after it?moreless

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Ultimate Weapon

Full Episode

S 2 : Ep 8 - 7/6/06

In Texas, a group of men discover a mysterious mask belonging to Ah Puch, the Mayan god of death and destruction. The mask is the key to the ultimate weapon in the world, known as the Sword of Ekchuah. However, when Grandpa Max and his grandkids learn that the mask is discovered, he impatiently sets out to obtain the mask, so that it does not fall in the wrong hands. Unfortunately, they find out that Enoch of The Organization is after it as well. The kids worry of how Grandpa Max has become, but with Enoch in the way, will Grandpa Max find the sword before him?moreless

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