Clone Wars Chapter 20 " Chapter 20 " is the twentieth episode of the " " animated television series , the tenth and final episode in , and the twentieth and final episode in . Directed by Genndy Tartakovsky , the episode originally aired on Cartoon Network on April 8 , 2004 . The episode occurs midway through the total time length of the series . It shows the end of the Battle of Muunilinst , which started with the debut of the series , and introduces General Grievous , who will dominate the rest of the storyline . Plot summary . On Muunilinst , Jedi Master Voolvif Monn leads his clone troopers into battle against the last remaining pockets of battle droids . Suddenly , the droids deactivate , and Obi - Wan Kenobi tells Monn that the InterGalactic Banking Clan have surrendered , and the Galactic Republic is victorious . As Kenobi supervises the loading of Muun and Neimoidian prisoners - of - war onto Republic transports , Captain Fordo reports that a ship matching the one that Anakin Skywalker had pursued is approaching . Kenobi orders him to hold fire , and Skywalker exits the starfighter , apologizing for his disobedience and confirming the chase had been a Sith trap . As Kenobi upbraids his Padawan , he receives an urgent distress call from Jedi Master Daakman Barrek on Hypori . Barrek ' s forces have been wiped out by " a new droid general . " The signal cuts out abruptly . On Hypori , Barrek ' s dead hand drops his holo - communicator , which is crushed by a robotic clawed foot . Thousands of B2 super battle droids encircle a crashed Republic Acclamator , firing their blasters at it until the clawed hand of the caped figure in front of them signals for them to stop . Inside the wreckage , Jedi Master Ki - Adi - Mundi wonders why the attack has ceased . Five other Jedi , wounded and weary , surround him : Shaak Ti , K ' Kruhk , Aayla Secura , Tarr Seirr , and Sha ' a Gi . As the Jedi wonder how they could have been defeated by mere battle droids , a voice calls out to them : General Grievous . The sound of Grievous ' s approaching footsteps panics some of the Jedi , but Ki - Adi - Mundi urges them to remain calm . It ' s too much for Sha ' a Gi , who charges into the open air where he is crushed to death as the metallic frame of General Grievous lands on top of him . Just as quickly , the general leaps out of sight , before dropping onto the remaining Jedi wielding two lightsabers . Spinning his torso around , Grievous easily holds off the four attacking Jedi , finally downing K ' Kruhk . His clawed metal limbs get hold of Tarr Seirr and snap his neck , before hurling him and Aayla Secura across the chamber , followed by Ki - Adi - Mundi . Shaak Ti manages to hold off Grievous for some time , before she is hit by one of his spinning lightsabers and thrown into the wreckage . His own lightsaber held by Grievous ' s foot , Mundi uses the Force to pull one from Grievous ' s belt , which he ignites and raises into a guard . The two stare at each other for a moment before the droid general leaps at him , lightsabers angled for the kill . On Coruscant , Master Yoda senses a disturbance in the Force : " Mmmm . Darker , the coming storm grows . I fear the dark cloud of the Sith shrouds us all . " ( ) Development . Originally , the last chapter was going to involve Anakin and Obi - Wan fighting Durge . This was changed when George Lucas requested that they introduce General Grievous . The introduction of Grievous in animated form in " Chapter 20 " prior to the release of " Revenge of the Sith " ( 2005 ) is reminiscent of Boba Fett ' s introduction in animated form in " The Star Wars Holiday Special " prior to the release of " " ( 1980 ) . Continuity . This episode marked the first appearance of General Grievous , who is voiced by John DiMaggio ( best known for playing Bender the robot in " " ) . In , Richard McGonagle voiced the character . This episode is more than twice as long as the previous episodes in the series at 7 minutes 15 seconds . After Grievous fights the five Jedi initially , jumps to a wall , and jumps again near them , Shaak Ti ' s lightsaber blade appears green , though it is blue seconds before and later . In this episode , Grievous is depicted with five fingers and only uses two of his arms , although Grievous has six fingers and uses all four of his arms in Chapter 25 . In this episode , Grievous holds his defeated Jedi lightsabers on his belt . In " " , they are held in his cape . Over the course of the first and second season , Captain Fordo ' s rank changes . In " Chapter 3 " he is a sergeant , in " Chapter 9 " Obi - Wan calls him commander , and here he is a captain .