Escape from Aggregor

Escape from Agreggor is the fifth episode of Ben 10: Ultimate Alien.

Original Airdate
May 21, 2010

Plot
After facing off against and defeating Dr. Animo, Ben learns from a Plumber agent that an alien creature is causing trouble near Bellwood. Using a plumber badge to translate the creature's language, Ben, Gwen, and Kevin discover the story of how the alien (named Galapagus) and how he was captured along with five other aliens and tried to seek out Ben Tennyson. On the planet Aldabra, Galapagos was captured by an Osmosian by the name of Aggregor and put in a prison onboard a spaceship with four other aliens Andreas (Armodrillo), Bivalvan (WaterHazard), P'andor (NRG), and Ra'ad (Ampfibian) to be tested on by a powerful device that can drain any creature of all of its powers.

After escaping from prison, the five aliens take two different paths to freedom, with Andreas and Pandor attempting to overpower Aggregor, Radd, and Bivalvan, Galapagos, and signaling a distress signal to escape. Even though both teams end up back in prison, Magister Prior Gilhil is alerted to the S.O.S. and finds them in prison. Just as all seems safe, Aggregor absorbs Gilhil and possibly kills him, leaving the five aliens running for means of escape. Andreas, Pandor, Bivalvan and end up in Aggregor's control room, discovering that Galapagos had betrayed them in exchange for his freedom. In the end, Galapagos reveals that he tricked Aggregor and knocks him and his crew out, allowing the five fugitives to reach an escape shuttle (the same shuttle that Bivalvan was repairing) and crash land on Earth, where they split up, beginning Galapagos' search for Ben. Back to present day, Ben scans Galapagos for his form, then sends him back with a Plumber agent, only for the Plumber to be revealed to be Aggregor in disguise.

Major events

 * Aggregor's species is Osmosian
 * Ben gets a new DNA sample (Terraspin)
 * Backstory of the five aliens captured.

Characters

 * Ben Tennyson
 * Gwen Tennyson
 * Kevin Levin
 * Magister Prior Ghilhil
 * Bivalvan
 * Galapagus
 * P'andor
 * Andreas
 * Ra'ad

Villains

 * Agreggor
 * Dr. Animo
 * Yeti (Under control of Dr. Animo)

Aliens used

 * Fourarms
 * Brainstorm
 * Big Chill
 * Ultimate Big Chill