Prisoner Number 775 Is Missing

Prisoner Number 775 is Missing is the 32nd episode of Ben 10: Ultimate Alien, the twelfth episode of season 2, and the last episode of season 2.

Plot
This episode starts with Old George walking towards Area 51 and approaching two guards. While the guards try to politely get rid of him, Old George, with surprising strength, knocks them out and goes inside Area 51, where a bright light shines, making the base disappear. Meanwhile, Ben as Swampfire, Gwen and Kevin are roasting hot dogs, when Grandpa Max gets a call from Cooper about Area 51's disappearance. They decide to go to Area 51 to investigate what happened. Max, Ben, Gwen and Kevin arrive at Area 51 and meet with Cooper and Colonel Rozum, according to Cooper there are no signs that the base was destroyed or teleported away, it just up and disappeared. They go down to the crater where the base was and find a level 3 tech floor, where Colonel Rozum reluctantly explains it is part of a holding facility for alien combatants that has been held up to the past 50 years and Ben turns into Big Chill to investigate under what is there while Max and Rozum argue over the conditions (as the facility breaks the law under the Casey-Kelly Accords) and finds a bunch of trapped aliens in cells and that there are exactly 774 aliens. But Colonel Rozum says that there is supposed to be 775, where an invisible lizard like-alien boards a Plumber ship and attempts to escape with it. Ben transforms into Rath (although he intended to be Humungousaur) and uses his long black claws to cling himself onto it to catch the escaped prisoner, but eventually falls off and seemingly, down to his unexpected death.

However, Ben was able to survive and find the damaged Plumber ship landing on a dock. They find the ship empty but by crashing and abandoning it the prisoner accidentally set it to self-destruct and Kevin tried to deactivate it, but sped it up. Ben transforms into Echo Echo (again, intending Humungousaur) and produces an army of clones that throws the ship into the lake, but the lake was too shallow and the ship blows up. They find a town where the alien is attacking. Ben transforms into Humungousaur (although this time he purposely said he wanted Goop and got Humungousaur) and he and the group fights Prisoner 775.

After Gwen traps him in a mana sphere, he says that 50 years ago he was a soldier fighting a dictator on his world before being exiled to earth and captured by the American airforce and in his absence his family was killed. Kevin suggests him to "even the score" and Ben advising him to seek justice, which ultimately leads him to decide to exact revenge on Colonel Rozum and his family for his imprisonment and tricks Gwen into letting him free, where the building crumbles around them, but are protected by Gwen's shield. They decide they must stop Prisoner 775 from killing Colonel Rozum and his family.

The group informs Max and Cooper of Prisoner 775's revenge plan and fly to Florida to find Colonel Rozum before he does. However, it is revealed Prisoner 775 hitched on the ride and runs away. Ben transforms into Wildmutt to track him. 775 finds Rozum's house and suggests whether not to attack when he sees his wife and a child, but suddenly is attacked by Ben and the group.

When he seems too stealthy to take on and when he was about to kill Rozum, Ben transforms into Ultimate Wildmutt and stops him, but 775 begs for Ben to kill him so he can be reunited with his family and cries over their deaths, shocking Rozum.

Spared, 775 is then taken by the Plumbers while Ben scans his DNA and unlocks its transformation. Ben transforms into ChamAlien (he says Overkill which was a joke at the beginning of the episode) and while Gwen and Kevin walk away with Ben following them, with the mess resolved Max takes the opportunity to chew out Rozum, he can use whatever justification helps him sleep at night, but the simple fact remains if he had shown simple mercy to 775 and followed proper procedure all those years ago he would have prevented the destruction wrought today and the reckless endangerment of Rozum's family and the lives of others.

Major Events

 * Ben scans and transforms into ChamAlien and first transforms into Ultimate Wildmutt.
 * Area 51 is introduced and shown to be an alien prison which is illegal under interstellar law.
 * Old George Returns.
 * The team meets Prisoner 775.
 * Prisoner 775 is taken into Plumber custody.

Characters

 * Ben Tennyson
 * Gwen Tennyson
 * Kevin Levin
 * Max Tennyson
 * Cooper Daniels
 * Colonel Rozum
 * Rozum Family

Villains

 * Prisoner 775 (main villain of the episode)
 * Old George

Aliens Used

 * Swampfire
 * Big Chill
 * Rath (selected alien was Humungousaur)
 * Echo Echo (selected alien was Humungousaur)
 * Humungousaur (selected alien was Goop)
 * Wildmutt
 * Ultimate Wildmutt (first appearance)
 * ChamAlien (first appearance)

Ultimatrix Alien Debuts

 * Ultimate Wildmutt
 * ChamAlien

Errors

 * At the beginning, when Old George throws the board at the white officer, it shows the black officer with the board over it instead.
 * When Rath came out of the hole and was bending over he looked like Humungousaur.
 * While Echo Echo was running away from exploding Plumber Ship, his contour has a covered part of the Ultimatrix.
 * When Ben was planning to transform into Humungousaur but got Echo Echo, the hologram was Echo Echo's.
 * When Ben's team was picking up the sheriff who was knocked out, his badge changed from gold to blue.
 * In one scene, after Humungousaur fighting Prisoner 775, Prisoner 775's spout on his body apperance is reversed.
 * When Prisoner 775 slipped from Gwen's mana-shield, his teeth contours were same colour as his skin.
 * When Gwen was shielding the prisoner, Kevin was shifting between his normal form and his metal form. This error is like the error of the episode Ben 10,000 Returns when he was shifting between his normal and his metal form.
 * When Prisoner 775 looked at the window of Colonel Rozum's house, it showed Rozum's wife holding their baby who had only a white blanket over him. But in the next scene, the baby was chewing a blue pacifier in his mouth.
 * After Prisoner 775 looked at the window and Wildmuttjumped on him, he threw Wildmutt back, saying Leave me be, I entanch to balance the scales. You know that he has eyes coloured like this, Red, Green, Blue, but when he turned his face to Kevin, his eyes was coloured like that, Blue, Green, Red.
 * During the scene when Kevin is trying to punch Prisoner 775 there is one moment when you can see the mailbox, but the front of the mailbox is facing the house and not the street.
 * When Ultimate Wildmutt was holding Prisoner 775's tail, his top lip wasn't black.
 * The amount of strength that Prisoner 775 has rapidly changes throughout the episode.
 * When they were running out of the ship which was about to explode, Ben's 10 emblem was messed up with black and white colors switching again.

Trivia

 * According to Cooper, It seems that Earth is least 500 years away from level 3 tech.
 * This episode marks the first time in Ultimate Alien that Wildmutt was used by Ben in person, in the current timeline, conciously and on-screen. Before this, he only appeared in a television flashback of the original series in Fame, The Forge of Creation used by a young Ben, unconciously in Viktor: The Spoils and off-screen in It's Not Easy Being Gwen.
 * This episode is similar to ...Nor Iron Bars a Cage because the main "villain" is trying to get back at the main person who caused the death of the ones they care about.
 * It is shown in this episode that Earth is in direct violation of interstellar law in this episode when Max learned of Area 51 and its alien prisoners.
 * The roar of Ultimate Wildmutt is similar to the roar of the Lucubra.
 * This is the fifth time that Ben uses an alien obtained in the same episode. First was in Benwolf, second was in Be Afraid of the Dark, the third was in Alien Swarm and the fourth was in Fused.
 * The voice of Ultimate Wildmutt is similar to Ultimate Humungousaur.
 * This is the first appearance of Swampfire since his "destruction" by Eon in Ben 10,000 Returns.
 * Ben and the gang's birthdays seem to be coming up soon since summer is over and school is back. Gwen also joked that she might get Kevin a Plumber's ship for his birthday.
 * This is the second Ultimate Alien episode in which there is subliminal language or message. The first was in Hero Time when Ben mentioned cross-pollination with Jennifer Nocturne. In this episode, Ben said "Oh, truck".
 * Area 51 was first mentioned by the Special Alien Capture Team back in the episode Framed, even though they didn't make any appearances nor were mentioned in this episode.
 * Area 51 is present in the video game Ben 10: Protector of Earth.
 * It appears Cooper has become a Plumber and first episode use his Plumber suit.
 * Ben reveals he shouts out his alien's names to strike fear into his enemies.
 * A running gag in this episode is how ineffective of the name "Overkill" and Ben's aliens being named. Ben joked saying that ChamAlien's name was Overkill, this is a joke based on the beginning of the episode in which Gwen said that using Swampfire to light a campfire was "Overkill".
 * This is the first time (not counting the original series) that Ben scans an alien and the DNA is already there(The Ultimatrix says it has become available on Playlist 5)
 * If you pay close attention to Swampfire in all appearances you will notice that he always has fangs, they are just more visible in this episode.
 * Wildmutt's transformation sequence is shown, and it looks similar to that of the original series, apart from the first two seconds.
 * It is revealed that Ultimate Wildmutt can talk, unlike his base transformation (Gwen shouts out his name since he can't speak it).
 * When Gwen shouted Wildmutt's name it is similar to ten-year-old Ben in the begining of Ghostfreaked Out
 * Kevin says "Thank you, Captain Obvious." to Ben. It was the same quote used by Cornelia Hale in W.I.T.C.H to Caleb (who has the same voice as Kevin).
 * When the old police man in the city who got attacked by Prisoner 775 said that his daughter told him about Ben, Ben asked if she is "cute".(He then apologized, and said it was a reflex, or a habit.) The same dialoge was used by Ben in the episode In Charms Way when Kevin mentioned Charmcaster. This means that Ben is still interested in girls who like him.
 * When Ben said that Grandpa Max told Colonel Rozum what's happening and they are gonna be there soon, he looked at the Ultimatrix as if it was a wristwatch that shows time even though it is revealed in Vengeance of Vilgax: Part 2 that the Omnitrix cannot show time.
 * Rath destroyed a vehicle for the second time, the first was in Hit 'Em Where They Live when he destroyed Rojo's and her gang's bikes.
 * When Old George went to the base and the officer came to talk to him, the voice of the officer was similar to Grandpa Max's.
 * When Rath falls from the stolen Plumber ship, the event was similar to the Road Runner cartoon including a character shaped hole and surviving a fall from insane heights.
 * This episode is not included in Ultimate Alien Volume 3 DVD.
 * In this episode there were 2 mistransformations if you look closely you can see that in both cases instead of the alien Ben meant to transform into the holograms were of the aliens he did transform into.