Cat and Mouse " Cat and Mouse " is the sixteenth episode of of the . It aired on March 20 , 2010 in the UK and on March 26 in the US . It serves as a prequel to all the other episodes , and is chronologically followed by sixteenth episode The Hidden Enemy . Official description . " Obi - Wan and Anakin must deliver supplies to Christophsis while the planet is under Separatist control . They encounter Separatist Commander Admiral Trench and get more than they bargained for . " Plot summary . From the surface of Christophsis , Senator Bail Organa conferences via hologram with Anakin Skywalker and Admiral Wullf Yularen on - board the Star Destroyer " Resolute " . Separatist forces are on the verge of overrunning his position , and his food , water and munitions have all but run out . The hologram is cut off as another Republic ship is hit by incoming laser fire , and Skywalker and Yularen desperately try to salvage their own losing battle against the Separatist blockade around Christophsis . The enemy flagship " Invincible " bears down on the Republic fleet , with the Separatist commander Admiral Trench concentrates his fire on the smaller Republic supply ships . As Skywalker prepares to over - fire all reactors on the " Resolute " and charge the enemy flagship , another Republic cruiser , the " Negotiator " commanded by Obi - Wan Kenobi , emerges from hyperspace behind them . At the insistence of Kenobi — who claims he has a new toy — and Yularen , Skywalker reluctantly orders a retreat to behind Christophsis ' s moon . Trench allows them to go , reminding his tactical droid that their orders are to blockade , not pursue . Crossing over to Kenobi ' s cruiser , Anakin discovers his Master ' s new weapon : a prototype stealth ship equipped with a powerful cloaking device . Skywalker is excited by the potential of this ship , but Kenobi insists his new mission is not to engage the Separatist fleet ; instead , Skywalker is to use the stealth ship to sneak through the blockade and deliver supplies to Senator Organa on the surface of Christophsis . Meanwhile , Admiral Yularen , doing some research of his own , notices something on the enemy flagship : a strange emblem that he recognizes in horror . Catching up with Anakin as the Jedi is about to depart , Yularen explains that the symbol is the personal crest of the infamous Admiral Trench . Anakin is surprised , since history tells Trench perished at the Battle of Malastare Narrows . Yularen , who fought at the battle , relates what he remembers about the battle . Trench had been in command of a corporate fleet blockading Malastare and his tactics had been deadly enough to thwart the Republic fleet sent against him . Yularen comments that he lost many good men and the Republic fleet barely managed to survive . Only when a Jedi - led task force arrived did the tide of battle turn . It was assumed that Trench went down with his ship , but the tactics used in the earlier battle and the appearance of Trench ' s symbol makes Yularen believe his old enemy has returned . Undeterred , Anakin takes off with the stealth ship , accompanied by Yularen as a volunteer . Meanwhile , Trench , wanting to add pressure to the Republic fleet still hiding behind the nearby moon , dispatches a squad of " Hyena " - class bombers to the planet surface , with the intention of bombing Organa ' s command center . After narrowly avoiding an inadvertent collision with the bombers , and having receiving a message from Obi - Wan regarding Bail ' s peril , Anakin decides to attack Trench ' s ship directly , hoping to divert Trench ' s attention from the planet . De - cloaking to attack , the stealth ship fires four proton torpedo es , only for them to explode harmlessly against the " Invincible " ' s thermal shield s . Trench responds with two missiles of his own , but Skywalker utilizes decoy flare s to divert the missiles away from his ship , and is able to re - cloak . Trench orders a barrage of laser fire , but Anakin skillfully avoids it . Trench surmises that the stealth ship must be piloted by a Jedi , since no clone is skilled enough to avoid such a barrage . Trench transmits a message over an open frequency , commending Skywalker ' s bravery and daring , but warning he has faced and beaten ships armed with cloaking devices before . Skywalker contacts Kenobi , who explains that Trench ' s war record confirms his threat : he has defeated ships with cloaking devices before , but mostly in cruiser to cruiser engagements . In all previous cases , Trench used tracking torpedo es to destroy the enemy whether or not their ship was cloaked . Since none of the ships Trench has faced before were as small as the stealth ship , Skywalker theorizes that Trench locks the torpedoes onto an enemy ship ' s magnetic signature . On board the " Invincible " , Trench ' s tactical droid calculates that the Jedi will not turn back as the admiral suggested . Trench agrees , stating that a stealth ship could have slipped past the blockade , but this Jedi chose to attack instead . Sensing a way to use this against him , Skywalker attacks again . The stealth ship ' s torpedoes are again ineffective , but this time Trench is able to lock onto the stealth ship ' s magnetic signature and fires tracking torpedoes , ignoring his tactical droid ' s warning that he would have to lower his shields to do so . With the torpedoes locked onto them , Skywalker diverts all power to his ship ' s engines and flies straight at the " Invincible " . Realizing his mistake too late , Trench orders the shields be raised , but his tactical droid states that they are still re - charging . As Trench watches in horror , Skywalker flies the stealth ship inches past the " Invincible " bridge , scraping the hull as it goes past . Accepting defeat , Trench closes his eyes and awaits his fate . Seconds later , the tracking torpedoes slam into the bridge , destroying the " Invincible " . With Trench ' s flagship destroyed , Kenobi and Commander Cody launch a new attack on the leaderless Separatist fleet , while Anakin and Yularen pilot the stealth ship down to Christophsis to deliver the vital supplies to Organa and his men . On the surface of the planet , Senator Organa thanks Skywalker , stating that he has saved a great many lives today . Then , Yularen expresses both concern and admiration for Skywalker ' s daring , if unorthodox , tactics . Development . It is the sixteenth episode of Season Two . Like also the sixteenth episode of the it is also a prequel to the series and . Chronologically , it takes place before all previous episodes of The Clone Wars ( followed by The Hidden Enemy ) , hence Skywalker and Yularen getting to know one another for the first time . Almost the entirety of the Sith Dreadnaught cruiser article from the fan site Wookieepedia was copied verbatim to a data screen seen in the episode . The text , translated into Aurebesh , and still containing a reference number and an anachronistic and contradictory use of BBY , appears on a data screen entitled " Enemy Ship Profile , " which is displayed on the bridge of Anakin ' s cruiser , when an officer reports that a supply ship had been hit . The screen seems to indicate that Trench ' s ship , the " Invincible " , belongs to the Sith Dreadnaught class . The overall events of the episode , more specifically the usage and design of the Stealth Ship , were based on Submarine Warfare during World War II .