The worst episodes of Ben 10: Ultimate Alien
Ranked by viewer rating, lows first. Lit marks on the season rail place this list across the run. Vote on a placement to back it or contest it.
- 01
Ma Vreedle goes to Earth to expand her family by creating clones and using all the water on Earth.
- 02
Ben's secret is out. As Ben deals with his newfound fame, a new threat emerges as a thief steals parts of a new advanced spaceship from NASA.
- 03
Colonel Rozum asks the team to investigate an island of garbage where people have been disappearing.
- 04
Dr. Animo is unexpectedly paroled from prison and starts up a company selling eggs, which in fact contain mutant dinosaurs which he wishes to distribute around the world.
- 05
Cash and JT convince the team to allow them to take credit for the team's actions so they can earn money for Cash's mother's operation.
- 06
Aggregor is after the next piece of the map on a watery planet.
- 07
The King of Zarkovia asks the team for help with a civil war. The team agrees to help when they find out Dr. Viktor may be involved.
- 08
Jimmy Jones is looking for the biggest new story he and Ben can tackle, but thats when he stumbles upon a strange pink tentacled creature which crashed from the sky into a near by cave.
- 09
Gwen is excited by the prospect of her cousin Sunny paying the team a visit while dealing with the Robots of Dimension 12. But her excitement quickly turns into trepidation when it is uncovered that her cousin is not all that she appears and has some particularly sinister intentions.
- 10
Simian asks the team for help when a DNAlien takes over his home world.
- 11
Julie suddenly leaves a tennis tournament and spends all her time with Ben.
- 12
The Flame Keepers realize their mistake too late. Vilgax wants the power of Daigon. The Forever Knights are out to destroy Daigon. Ben and the team try to sort things out.
- 13
Ben, Julie and the rest of the heroic crew embark on a dangerous journey that could cost them all their lives in an effort to achieve the safe return of Ship and his former owner Baz-L.
- 14
Albedo attempts to get the ultimatrix by invading Ben's mind.
- 15
P'Andor, escaped from Aggregor, now wants help to escape his encapsulating suit, but Kevin's the first to perceive that that's a fatally bad idea.
- 16
Ben is supposed to attend a tournament to support his girlfriend, but the Forever Knights are trying to break into a museum. Ben tries to use the Ultimatrix to handle all his obligations.
- 17
Ben gets an offer to star in his own video game, but the designer's real motives are part of a plan to destroy Ben.
- 18
The Forever Knights unleash an evil force mistaken for an ancient weapon.
- 19
Ben, Gwen, and Kevin are summoned to a Plumbers' Academy to go under training that is supervised by Magister Hulka.
- 20
Old George, the original Forever Knight, reclaims his position, and orders the Knights to remove all aliens on Earth.
- 21
Ben faces Tecadon killer robots that have been programmed to kill him. Each robot is more powerful than the last one. Ben's only chance to survive is for Gwen to find out who commissioned the robots.
- 22
Ben's Ultimate transformations have developed their own personalities. Now they want their freedom from Ben.
- 23
The final battle between the Forever Knights and Dagon's Esoterica is in full swing, with Ben caught in the middle!
- 24
Vilgax re-emerges in his most powerful form ever! Can Ben stop him and save the universe?
- 25
After Jimmy Jones reveals Ben's identity, some of his enemies (such as Zombozo, Rojo, Charmcaster, Vulkanus, and Sevenseven) team up to try to attack his family. Now Ben and his friends have to protect them no matter what.
Shows like Ben 10: Ultimate Alien
The closest matches on shared genres, ranked by match strength and popularity.
- 01Action·Adventure·Science-FictionThe worst episodes of Stargate SG·11997–2008·Syfy
Stargate SG-1 is a science fiction series based on the original film Stargate. - 02Action·Adventure·Science-FictionThe worst episodes of The Mandalorian2019–2023·Disney+
After the stories of Jango and Boba Fett, another warrior emerges in the Star Wars universe. - 03Action·Adventure·Science-FictionThe worst episodes of Lanterns2026·HBOLanterns follows new recruit John Stewart and Lantern legend Hal Jordan, two intergalactic cops drawn into a dark, Earth-based mystery as they investigate a murder in the American heartland.
- 04Action·Adventure·Science-FictionThe worst episodes of Star Trek: Strange New Worlds2022–present·Paramount+
Star Trek: Strange New Worlds follows Captain Pike, Science Officer Spock and Number One in the decade before Captain Kirk boarded the U.S.S. - 05Action·Adventure·Science-FictionThe worst episodes of Ahsoka2023–present·Disney+Set after the fall of the Empire, Ahsoka follows the former Jedi knight Ahsoka Tano as she investigates an emerging threat to a vulnerable galaxy.
- 06Action·Adventure·Science-FictionThe worst episodes of Monarch: Legacy of Monsters2023
After surviving Godzilla's attack on San Francisco, Cate is shaken yet again by a shocking secret.
