The WORST episodes of Ben 10
Every episode of Ben 10 ever, ranked from worst to best by thousands of votes from fans of the show. The worst episodes of Ben 10!
The story of Ben, a typical kid who becomes very atypical after he discovers the Omnitrix, a mysterious alien weapon with the power to transform the wearer into ten different alien species.
#1 - A Small Problem
Season 1 - Episode 11 - Aired 3/11/2006
When Ben isn't tall enough for a ride at a water park, he decides to change into one of his alien forms to get even with the ride attendant. Unfortunately for him, the Omnitrix malfunctions and he ends up as Grey Matter. To make the situation worse, he is captured by an alien fanatic name, who decides to trade him in for fame and glory. Now Ben, as Grey Matter, must find a way out of this predicament, after being given to a secret organization for testing.
#2 - Side Effects
Season 1 - Episode 12 - Aired 3/18/2006
When Councilwoman Liang attempts to redevelop the downtown area, the demolition efforts disturb a man named Clancy, who has the ability to control insects. Meanwhile, as Ben stops a criminal as Upgrade, he spots at a nearby ice cream truck. When he climbs inside to get a snack, he gets himself locked inside and ends up catching a cold. The virus binds with the alien DNA in the Omnitrix, causing side effects, and weakening his normally powerful forms. On top of that, Clancy kidnaps the councilwoman and threatens the entire city with a meltdown at the nuclear power plant. Now, Ben must save the day while dealing with the strange side effects in his alien forms.
#3 - The Unnaturals
Season 3 - Episode 9 - Aired 3/17/2007
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.
#4 - Framed
Season 2 - Episode 3 - Aired 5/31/2006
At a city, Ben, Gwen, and Grandpa Max are waiting outside a video game store to purchase the newly-released Sumo Slammer video game. Gwen and Grandpa Max go the book store, but when they return to check on him, Four Arms comes out of the store by force. They return to the RV, and find that Ben is already there. Gwen yells at Ben for what he's done, but he has no clue of what she's talking about. But as she gives direct evidence that Four Arms was attacking the city, Ben heads out to find the perpetrator, using the identity of his aliens to ruin his current reputation as a hero.
#5 - Merry Christmas
Season 3 - Episode 4 - Aired 12/11/2006
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.
#6 - Midnight Madness
Season 3 - Episode 2 - Aired 12/2/2006
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.
#7 - Dr. Animo and the Mutant Ray
Season 2 - Episode 12 - Aired 8/25/2006
The Tennysons arrive at a swamp, where a 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 Ben ever learn his lesson in listening for a change?
#8 - Big Fat Alien Wedding
Season 4 - Episode 4 - Aired 8/2/2007
Ben, Gwen, and Grandpa Max attend a family wedding. During the ceremony, a strange alien attacks. Will the two ever finish this strange wedding?
#9 - Hunted
Season 1 - Episode 5 - Aired 1/28/2006
Ben will find himself facing his toughest challenge yet, when Vilgax sends out three alien bounty hunters: the crustacean-like Kraab, the mechanical assassin Sixsix, and the mysterious Tetrax (credited as Hoverboard) - to recover the Omnitrix. He soon learns that there's more than one way to defeat an enemy, and that things are not always what they seem.
#10 - They Lurk Below
Season 2 - Episode 10 - Aired 7/18/2006
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 enter the Undersea Manta Ray, a giant submarine, they encounter strange aliens that threatened to destroy the whole resort. While the kids find a way to cooperate with each other to find the source that lures them in, Donovan himself learns a few lessons in how to bond better with his grandson.
#11 - Ultimate Weapon
Season 2 - Episode 8 - Aired 7/6/2006
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?
#12 - The Alliance
Season 1 - Episode 8 - Aired 2/18/2006
Ben, as Four Arms, thwarts an armored car robbery by a very tough female named Joey. During the fight, some of Vilgax's new and improved drones attack and Grandpa Max is injured. When Four Arms takes Grandpa Max to the hospital, Joey starts messing with the drones and is converted into a powerful alien cyborg named Rojo. With these enhancements, Vilgax is able to communicate with her and convince her to work for him. When she attacks Ben at the hospital, she is thwarted once again, but Ben is left thinking that it's too dangerous for him to be around others and runs away. During their final confrontation, it turns out to be the advice of Grandpa Max that helps Ben defeat her. As Upgrade, he is able to stop her, but not before receiving a disturbing message from Vilgax.
#13 - Washington B.C.
Season 1 - Episode 2 - Aired 1/13/2006
After Ben saves a child and parent in a burning building, Gwen and Grandpa Max come along with more bad news. In addition, there is a mad scientist roaming around Washington D.C. with a device that can change normal animals to mutant giants and also reanimate fossils of dinosaurs. The mad scientist, Dr. Animo, first encounters Ben, Gwen, and Grandpa Max at the M-Mart. After a grueling battle without the help of a hero, they chase down Animo to the Museum of Natural History. Gwen is then taken by a mutant bird, and Ben and Grandpa Max save her. Dr. Animo is then caught and restrained from receiving "the award he deserves," the Verities Award for science. Ben learns though an important lesson here: you don't always get what you might deserve.
#14 - Game Over
Season 3 - Episode 6 - Aired 2/24/2007
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.
#15 - The Big Tick
Season 2 - Episode 2 - Aired 5/30/2006
At Yellowstone Park, Ben and Gwen inadvertently discover a new form on the Omnitrix: Cannon Bolt, an armadillo-like alien that Ben isn't too fond of. Soon after, a meteor comes crashing down to the park, containing a planet-devouring, tick-like alien. On top of that, three other aliens arrive with it, and worship it as their savior, the "Great One." Powerless to stop the planet-eater with his regular forms, Ben must rely on a new form he knows nothing about.
#16 - Tourist Trap
Season 1 - Episode 6 - Aired 2/4/2006
After having a gross-out contest with the kid in the car next to him, Ben finds a propane truck tipped over, about to catch fire and cause a huge blast. With that taken care of, Ben and the gang are off to Sparksville, a town which brings new meaning to the words "tourist trap." After exploring all of Sparksville's many attractions, Ben and Gwen head over to see "it," Sparksville's main attraction. When they finally see "it," they are thoroughly disappointed and decide to pull a little prank. After Ben turns into Four Arms, he looses control and sends "it" flying and destroying the town. Ben says he will move it back, but the Omnitrix powers down and Ben accidentally unleashes Megawhatt, a small little alien with a big sense of humor. Now, Ben must stop this creature from destroying Sparksville.
#17 - Gwen 10
Season 2 - Episode 4 - Aired 6/1/2006
When two robbers try to rob a gas station mart, Ben decides to turn into Four Arms to stop them. However, when he tries to activate the Omnitrix, it seems to be missing from his wrist. To make the situation more confusing, Grandpa Max and Gwen seem to have no knowledge of the summer they've spent together so far. It turns out that it's the first day of their vacation. Ben discovers that he has traveled back in time, and he decides to get the Omnitrix again. When he arrives at the crash, though, Gwen was able to get there first and obtain the device. Gwen has more control over the Omnitrix than Ben did. Can Ben find a way out of this alternate reality, and get things back the way they were?
#18 - Benwolf
Season 3 - Episode 5 - Aired 2/17/2007
Ben, as Wildvine, is fighting against an evil 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.
#19 - Permanent Retirement
Season 1 - Episode 4 - Aired 1/21/2006
While shopping at an ice cream store in the desert, robbers attempt to steal an ATM. Ben and Grandpa Max capture the villains, but this is only the lesser of their problems. Then they drive to a retirement center to visit Aunt Vera for the weekend, but something very strange is happening here. Ben finds out that there is an evil species of alien shape-shifters taking over the retirement center for food. How will Ben save the day from robbers, strange aliens, and cheek-pinching aunts?
#20 - Grudge Match
Season 2 - Episode 5 - Aired 6/7/2006
In the middle of nowhere, Ben, as Diamond Head, fights Kevin 11, who is still in his mutated form. As they fight, they are taken to a ship, where a battle between different aliens are held. But when a mechanical droid named Slix decides to create a bond with Ben and Kevin as a team, they immediately turn his idea down. But with no choice, they must find a way out. Will Ben and Kevin learn the importance of teamwork?
#21 - Don't Drink the Water
Season 4 - Episode 3 - Aired 7/26/2007
After being in contact with water from the Fountain of Youth, Grandpa Max and Ben are reverted to being kids again. Now, Gwen is left to take care of them while stopping Hex from finding the fountain's source.
#22 - Ben 4 Good Buddy
Season 4 - Episode 5 - Aired 9/22/2007
While on a desert highway, the RV gets stolen by a group of modern-day pirates, who use it to go on a robbery.
#23 - Back with a Vengeance
Season 2 - Episode 13 - Aired 10/9/2006
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. 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?
#24 - Super Alien Hero Buddy Adventures
Season 3 - Episode 7 - Aired 3/3/2007
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.
#25 - Last Laugh
Season 1 - Episode 9 - Aired 2/25/2006
After dealing with some criminals at a dock, the trio finds their way to a circus run by a clown named Zombozo, much to Ben's chagrin. There, Ben's fear of clowns comes out as they explore. They find a freak show along the way, featuring a trio of mutants with incredible abilities. During Zombozo's show, Ben is too afraid to laugh and ends up leaving. His departure turns out to be for the best, since Zombozo drains the happiness of others to sustain and empower himself. Meanwhile, Ben finds the freaks robbing the town. Ben is able to beat them, but can't bring himself to fight Zombozo. He has to find a way, though, since Zombozo kidnaps Gwen and leaves the entire town in a chuckling daze.