The Zillo Beast Strikes Back " The Zillo Beast Strikes Back " is the nineteenth episode of of the . It aired on April 10 , 2010 in the UK and on April 16 in the US . Official description . " Republic forces bring the Zillo Beast back to Coruscant for study . When it escapes , the Jedi must choose between saving millions of lives and destroying the Zillo Beast , the last of its kind . " Plot summary . The Zillo Beast is transported to Coruscant for study . Mace Windu is skeptical and fears that the creature is too dangerous to have been brought to the planet , though Supreme Chancellor Palpatine assures him that determining the secret of its invulnerability will bring a closer end to the war . Windu brings his concerns to Obi - Wan , who believes that , regarding what the Zillo Beast is capable of , bringing the creature to Coruscant is not worth the possible military benefits . When Windu explains that the Chancellor failed to heed his warnings about the danger , Obi - Wan suggests they let someone else try . Meanwhile , study of the Zillo beast is taken under personal study by Doctor Sionver Boll , who has it sedated and restrained . As she explains to Palpatine , attempting to remove the creature ' s scales to examine them in order to synthesize a stronger armor would be extremely painful to it . Palpatine suggests that killing it would be the best option . Boll , stating that the Zillo beast isn ' t only the last of its kind , it may also be sentient ; Palpatine dismisses the possibility , stating that the giant beast is simply an animal ; the beast growls at his comment and stares hatefully at the Chancellor . Palpatine orders the use of the Malastarian fuel to be used as a poison to quickly kill the beast and threatens to replace Boll if she doesn ' t have the stomach to do it . At the Senate , Anakin sees Obi - Wan talking to Padmé Amidala . He quickly guesses that she and Obi - Wan wants him to talk to the Chancellor to discuss the fate of the Zillo beast . Padmé points out that the beast was brought to Coruscant against its will and has no literal voice to defend itself . Reluctantly , Anakin agrees . When both he and Padmé meet with the Chancellor , the latter and Mas Amedda try justifying that killing the beast is for the greater good , to which Padmé challenges that killing the last of a species in secret and without discussion can be good for none ; Anakin stays neutral and acknowledges both points of view : Palpatine remarks that Obi - Wan taught him well , though Padmé is less impressed that Anakin is taking Palpatine ' s side , not hers . Back in Boll ' s lab , she attempts to administer a small dosage of Malastarian fuel as a poison gas to euthanize the Zillo beast . Unfortunately , when a small amount was applied , the creature becomes agitated and aggressive , breaks free of its bonds , smashes its way out of the laboratory and starts rampaging across Coruscant , unhindered by all efforts to stop it . When it sees the Senate , it makes its way towards it , planning on getting revenge on Palpatine . The Chancellor , Padmé , Anakin and R2 - D2 evacuate to the former ' s escape shuttle , only to be caught by the beast just as they take off . Anakin comes up with a dangerous plan to free them by slicing off the front part of the shuttle , while Yoda and Aayla Secura distract the beast . But when the front half splits off , Anakin , Padmé , R2 and C - 3PO fall out , while the Chancellor and a Senate Commando fall a level below , escaping a certain death thanks to Obi - Wan Kenobi and Mace Windu , who Force - grip the front half of the Chancellor ' s ships , interrupting its course . R2 manages to grapple himself to the side of the building , preventing C - 3PO from continuing his fall , while Anakin helps Padmé up from slipping off the edge . The Zillo beast then attempts to crush Palpatine with its hand , only for R2 to quickly fly in and save the Chancellor , while the commando is crushed saving him . Gunships arrive and open fire ; at Palpatine ' s orders , they fire flares first to get the Beast ' s attention , then when it roars at them , the gunships fire poison gas bombs straight into the monster ' s mouth . As the gunships continue to bomb the beast , the gas cloud begins to spread , though Anakin , Yoda and Aayla use the Force to protect themselves , Palpatine and Amidala from the gas . As all the Jedi look on in regret , the Zillo beast , confused , in pain and dying , finally succumbs to the poison and falls from the roof of the Senate to its death below . The next morning , the body of the Zillo beast is carted away . Anakin laments that it was sacrificed for their mistakes . Palpatine promises everyone that he ' ll make sure that sacrifice was not in vain . As he and the Jedi part ways , Palpatine gives new orders to Boll : clone the beast . Behind the scenes . The Jedi Temple Archives feature on Blu - ray includes the deleted scenes " Strategy in the Jedi War Room " and " Trapped in Palpatine ' s Shuttle " .