Duped is the second episode of Ben 10: Ultimate Alien.
The Forever Knights try to invade the museum using an alien paramilitary tank and they are talking about how easy their heist will be when Rath tears open the tank. Rath yells at them and they shoot him. He gets mad, but gets a call and answers it. Gwen asks where Rath is, as he is supposed to be at Julie's tennis game. Rath yells at her, saying that he is fighting Forever Knights. She tells him to get there. The Forever Knights flee away and Rath destroys their tank.Ben goes to the tennis game, where his grand entrance distracts and annoys Julie. She messes up, but wins the game. Ben congratulates her and she yells at him for not being there and Gwen does as well. The final match is in three hours. At the Forever Knights' castle, the two Forever Knights answer to their king named Urian, who is angry at their failure and kills one of the Forever Knights. Gwen and Kevin argue over whether or not going after the Forever Knights is important as Ben looks for show times for the Sumo Slammers movie. Gwen forbids Ben from going to the movie. Conflicted over whether to go with Kevin, stay with Gwen, or go to the movie, but Ben gets an idea. Ben enters into a restroom, transforms into Echo Echo, and creates two clones. The three Echo Echoes transform back into Ben at the same time, which creates three Bens: normal, sensitive, logical and insensitive. logical Ben goes to see Sumo Slammers, sensitive Ben goes with Kevin, and insensitive Ben stays at the match. Urian and two Knights go through a sewer and blow up a wall, creating a tunnel that they enter.
At the match, Insensitive Ben makes loud comments, which distracts Julie, and he does loud interviews. Ben also flirts with other girls, angering Gwen and Julie. Meanwhile, Kevin and sensitive Ben arrive at the museum. Ben talks about his feelings, which annoys and weirds out Kevin. Back at the match, Gwen yells at Ben for being a jerk and he loudly says that Julie is supposed to lose. Meanwhile, the regular Ben is enjoying the movie. The Forever Knights are burrowing under the museum and one of them plant a device at Urian's behest. An explosion rocks the museum and Kevin recognizes the device. Ben transforms into Humungousaur and The ground collapses beneath him and Kevin.
They fall into where the Forever Knights are located and the Forever Knights attack. Humungousaur says that the Knights are being hurtful and Kevin tells Humungousaur to do something, but Humungousaur says that they should work towards a common plan and Kevin tells Humungousaur to throw him. He does and knocks out the Forever Knights. Humungousaur hits his head and transforms back into Ben. Urian gets to the artifact he is looking for, which is a jewel, and takes it. Ben tells him not to touch the exhibits, which disgusts Kevin. While they argue, Urian activates a suit of ancient robot armor, Toltech Battle Armor, that envelops him. He attacks Ben and Kevin. As Kevin fights Urian, sensitive Ben calls the other Bens. They both run to help, disappointing Julie. They arrive, which causes Kevin to be confused. They explain the situation to Kevin and then activate their Ultimatrixes. Logical Ben transforms into Big Chill, Sensitive Ben transforms into Cannonbolt, and arrogant Ben transforms into murk Upchuck. The three aliens attack Urian, but they ultimately get in each others' way and they are all defeated. They all transform into Echo Echo and merge into one. Echo Echo transforms back into Ben and Kevin is being defeated by Urian. Ben then transforms into Lodestar and Lodestar tears the armor apart with his magnetism. The pieces of the armor fall on Urian, causing him defeating to be defeated. Lodestar turns into Ben. At the stadium, Ben apologizes to Julie for not being present at the match. Even though Julie won the tournament, she was upset at Ben thanks to his arrogant clone embarrassing her. She kindly asks Ben to make it up for her by taking her to see the Sumo Slammers 3-D movie to make up for it, but Ben mentions that he saw it during the match, which causes Julie to be very furious. She and Gwen storm off in disgust along with Kevin, leaving Ben all alone to repent for what he has done in order to gain back their trust.
Ultimatrix Alien Debuts
- Rath (Ultimate Alien debut)
- Echo Echo (Ultimate Alien debut)
- Murk Upchuck (Ultimate Alien debut)
- Big Chill (Ultimate Alien debut)
- Cannonbolt (Ultimate Alien debut)
- Lodestar (Ultimate Alien debut)
- Ben's middle name is revealed to be Kirby.
- Rath (first re-appearance; off-screen transformation)
- Echo Echo (x2; first re-appearance)
- Humungousaur (sensitive Ben)
- Murk Upchuck (arrogant Ben; first re-appearance)
- Big Chill (logical Ben; first re-appearance)
- Cannonbolt (sensitive Ben; first re-appearance)
- Lodestar (first re-appearance)
Naming and Translations
- When Gwen asks Arrogant Ben about his attitude, he replies "I'm Ben classic", a reference to his personality in the original series and the third season of Alien Force.
- This episode is the 100th episode overall of the franchise.
- An episode of Static Shock shares the same title and has also been written by Len Uhley.