Clone Wars Chapter 24 " Chapter 24 " is the twenty - fourth episode of the " " animated television series , and the fourth episode in and . The episode originally aired on Cartoon Network on March 24 , 2005 . Plot summary . Just as Grievous makes a grab for the Supreme Chancellor as the latter complains about this intrusion , Shaak Ti uses the Force to pull him away from Grievous ' s grasp . As the Jedi and the Chancellor make their escape , Grievous makes short work of the Senate Guard and clone troopers left behind to stop him . Waiting for the elevator , the Jedi turn around as the sound of battle from Palpatine ' s quarters stops , and Grievous crashes through the door . Grievous evades their Force attacks , but a Force - assisted shockwave from Roron Corobb ' s throats collapses the ceiling , stopping the General ' s advance . Shaak Ti explains to the Supreme Chancellor that Corobb has four throats , quite powerful . The Supreme Chancellor , picking his ear to get rid of the ringing , replies dryly , " So I ' ve heard . " As the elevator descends , Grievous appears running down the side of the building alongside the capsule . A clone trooper fires a missile at him , and when the smoke clears , he has disappeared . At the ground level , a legion of super battle droids stands waiting , and as Grievous lands in front of them , the droids begin to advance . Corobb ' s throat blast blows most of them away , but Grievous uses the claws on his feet to hangs on , slowly advancing towards them . Foul Moudama carries Palpatine and him and the other two Jedi run along with the troopers . Shaak Ti orders the troopers to call for support , but their communications are jammed . Two IG - 100 MagnaGuards suddenly appear in front of them . The Jedi and Palpatine manage to evade their electrostaffs , but the clone troopers are knocked to their deaths . On Nelvaan , Anakin Skywalker follows the wind and the frozen rivers to a cave far from the village . Inside , he manages to avoid several dangerous steam vents before happening across a wall covered in ancient Nelvaanian pictograms . As the gas fumes in the cave build up , Skywalker experiences a vision , seeing the pictograms move before him . He does not know that he is seeing his future . They show the Nelvaanians going about their daily lives , until a dark menace attacks them . A hero fights them off , but his arm is replaced by darkness as well . At first the hero uses his powerful new arm to protect the villagers from all attacks , but eventually his arm and powers grow out of control and destroy the villagers as well , consuming the hero and transforming him into a face which resembles the future helmet of Darth Vader . As Skywalker collapses , he hears Padmé Amidala calling his name . When he awakes , he sees a Siphon generator which is absorbing the planet ' s geothermal energy . The Jedi protecting Palpatine leap from platform to platform through Coruscant , with the two MagnaGuards closely in pursuit . They jump on to a floating barge , but are shortly joined by four MagnaGuards and Grievous himself , who disables the barge ' s repulsorlift generators . The Jedi flee into a subway station , leaping over trains and narrowly avoiding death as they fight the MagnaGuards on the tracks . Shaak Ti finally manages to destroy two of the droids , and Corobb destroys another . As Grievous appears and backs the Jedi into a tunnel , Shaak Ti uses the Force to wrap his cape around a pipe on a train carriage . She activates the train , and Grievous is yanked down one of the tunnels . The Jedi break a nearby window and make their escape . Avoiding the patrolling battle droids , Skywalker makes his way into the complex , where he overhears two Techno Union scientists discussing specimens for their " project . " Skywalker discovers tanks full of horribly mutated Nelvaan warriors , augmented with cybernetic implants and weapons . He watches as the latest Nelvaanian to be captured is submerged in a mutagen to be processed . The Techno Union scientists hurriedly release the " specimens " as Skywalker races in and destroys the battle droids . Skywalker tries to reason with the advancing creatures , insisting he is here to help them , but they slowly raise their weapons , roaring in anger . Development . According to the DVD commentary , director Genndy Tartakovsky wanted the brief scene where Grievous kills the remaining clone troopers behind the closed door in Palpatine ' s office to sound extremely violent . So he told the sound designers that he wanted " everything " to be heard , including , he joked , a buzzsaw . He was then surprised when a buzzsaw sound effect was put into the scene . It is left to the viewer to wonder if Grievous wields a buzzsaw weapon . Continuity . Anakin ' s vision in the Nelvaan cave directly foreshadows the events of " " . The Wilhelm scream is heard during this episode when one of Grievous ' s bodyguards kills a clone trooper . At one point , when Anakin enters the cave , his facial scar is missing .