Ben believes he is having the perfect day.
While at the beach, Ben discovers a new hero.
Ben and Max come in contact with water from the Fountain of Youth.
Ben and Gwen accompany Max to a wedding.
Part 1 of three. Stubborn Ben runs into trouble fighting Animo.
Part 2 of three. Stubborn Ben runs into trouble fighting against Animo.
Highway pirates use the Rustbucket in a robbery.
Ben tries to win money to replace Gwen's broken computer.
In the future, Ben 10K and his son team up to battle Kevin 11.
Ben, Max and Gwen make a stand against the Forever King and his gang.
The Forever King gathers some of Ben's enemies to steal a powerful energy source.
Ben must reveal his hero side to his parents and his classmates.
Gwen is abducted by her future self to help future Ben reconnect with his family and defeat Dr Animo's latest plan to revive Vilgax.
Ben and Gwen visit a mall, where an evil hypnotist casts a spell on Ben, causing him to sleepwalk and steal.
The Rustbucket breaks down in the middle of the desert leaving Ben, Gwen and Max to take refuge in an over-the-top Christmas theme park run by the mysterious Mr Jingles.
Ben is confronted by a Navajo Werewolf while visiting Grandpa Max' old friend in New Mexico; he gets bitten during the battle which causes some alarming changes.
Ben discovers that his aliens are the stars of a new cartoon series and his favourite action hero cartoon has been axed.
Max takes Ben and Gwen to a farm to show them the meaning of hard work; they discover that an alien has arrived to steal a rare and dangerous crystal.
Ben attends the Little League World Series to cheer his home team, but quickly discovers that their opponents are robots posing as kids and have a sinister plan.
Max takes the kids to a music festival in Chicago; a crazed weatherman plans to use his weather-predicting robot to change the weather and advance his career.
Ben travels into space with Gwen and Max to stop Ghostfreak plunging Earth into eternal darkness; they also face the Mummy, Frankenstein and Werewolf.
Xylene, the alien, comes to Earth to try and make sure the Omnitrix goes to Max, who she thinks is its rightful owner.
After the battle with Vilgax, Grandpa Max tells Ben and Gwen about his past tracking extraterrestrials.
Kevin comes back for revenge with an all new weapon in tow; Kevin begins committing crimes and frames Ben for them.
Ben is in trouble when Gwen receives the Omnitrix; she also receives all of the powers that go along with it and Ben must accept his new role.
Ben is transferred to a space ship, but he is shackled to Kevin; they must fight together to escape a space ship.
Ben joins forces with a group of alien super heroes to combat plans by two bounty hunters to build a bomb that is powerful enough to destroy the galaxy.
Max nearly runs over a summer camp attendee who has decided to run away; they agree to take him back to camp.
Grandpa Max finds out that part of an alien weapon was discovered in Texas, and goes after it himself.
Gwen's powers return at a convention in Las Vegas when she buys a magical stone that somehow restores them.
Ben, Gwen and Max are invited to take the first look at a new underwater resort built by Grandpa Max's longtime friend.
Ghostfreak manages to escape from inside Ben's watch and become his own being, but needs to possess Ben to gain control of the Omnitrix.
After Dr, Amino finally breaks out of prison, he is determined to track down Ben and get his revenge.
While on a summer road trip with his Grandpa Max and cousin Gwen, 10-year-old Ben Tennyson finds a prototype that allows him to change into ten different alien heroes.
Ben must battle mad scientist Dr. Animo, who plans to destroy Washington D.C. by bringing dinosaurs to life.
Ben encounters a sea monster while camping at the lake with Max and Gwen, but they don't believe him until the Krakken attacks.
Ben faces a difficult challenge when Vilgax sends the alien bounty hunters Sixsix, Crab and Tetrax after him to recover the prototype.
Ben's prank backfires when he accidentally releases a Megawhatt, a destructive monster made of electrical energy.
After an argument with Grandpa Max, Ben leaves for the city and meets a boy who can absorb energy, including the power of the Omnitrix.
Ben discovers that a gang leader has merged with parts of Vilgax's robot drones to become an alien cyborg.
Ben must overcome his deathly fear of clowns and face an evil circus with a psychic vampire clown when Gwen is kidnapped.
Ben defeats a magician whose power comes from mystical charms; when Gwen finds one of his charms, she develops amazing luck in battle.
Ben changes into an alien form to ride a roller-coaster; he gets stuck as Greymatter and finds himself captured by a sci-fi geek.
Ben's summer cold causes strange side effects in his alien forms while he tries to deal with a cockroach monster.