TJ - 55 / Legends TJ - 55 was a T - series tactical droid in the Confederacy of Independent Systems Droid Army during the Clone Wars . In 22 BBY , he and another tactical droid were stationed on Christophsis with the droid forces of the Retail Caucus , which invaded the planet . Soon after the invasion , the Galactic Republic sent an Army detachment , led by Jedi Generals Obi - Wan Kenobi and Anakin Skywalker , to liberate the planet . During the battle between Republic and Separatist forces , TJ - 55 led an ambush on the Jedi ' s forces at a business complex in Crystal City . As the remaining Republic forces tried to evacuate from the roof of the South tower , the tactical droid led a squad of B1 battle droids to attack the retreating clone troopers . However , during the fighting , the droid ' s head was ripped off by clone trooper Gus and was brought back to the Republic ' s base for a robolobotomy . The investigation only confirmed that there was a spy amongst the Republic ' s troops before the droid stopped processing . The spy was eventually revealed in the form of Clone Sergeant Slick , who was later apprehended . Biography . Battle of Christophsis . Manufactured by Baktoid Combat Automata , TJ - 55 , a T - series tactical droid , served in the Separatist Droid Army during the Clone Wars . In 22 BBY , he and another tactical droid were assigned to help General Whorm Loathsom of the Retail Caucus , an ally organization of the Confederacy of Independent Systems , to conquer the planet Christophsis . However , the Galactic Republic dispatched clone troopers , led by High Jedi General Obi - Wan Kenobi and General Anakin Skywalker , to liberate the planet . After landing , the Jedi began to prepare an ambush , but Clone Sergeant Slick , a Separatist spy embedded within the Republic forces , informed the Confederacy about the Republic ' s plan , and the location of the Republic forces was transmitted into TJ - 55 . Unaware of this , the Republic set up several repeating blaster cannon s in a double - towered business center in Crystal City and prepared to open fire at the droid forces as they passed through the city plaza below . Consequently , by the time the tactical droid led his forces to the towers , he was well aware of the presence of Republic troops . He commanded his B1 battle droid forces from his Armored Assault Tank and surprised the Jedi and clones by splitting his troops , thus bypassing the ambush . Battle droids then attacked the south - facing tower , where Kenobi was with his troopers . Kenobi and his clones were pinned down by the droids , but Skywalker noticed the situation from the north tower . He signaled an LAAT / i gunship for an evacuation and led his clone troopers to help Kenobi . The Republic forces were able to hold their ground but were forced to retreat with the battle droids ' larger numbers . As the Jedi and remaining clones took a turbolift to the roof , where the gunship was landing for evacuation , TJ - 55 left his tank and followed the Republic troopers with his droid forces . Downfall and robolobotomy . On the roof of the south tower , the tactical droid led the attack of the battle droids , in order to prevent the retreat of the Republic troops . Equipped with an E - 5 blaster rifle , he managed to shoot at least one clone trooper during the firefight . However , clone trooper Gus saw the tactical droid , jumped for him , ripped his head off , and leaped onto the Republic gunship as it departed from the tower . While the gunship left , the still - functioning body of TJ - 55 rotated senselessly , shooting several mis - aimed shots on its own . Later on at the Republic ' s Christophsis base , TJ - 55 ' s head was analyzed in a robolobotomy by Clone Commander CC - 2224 and Clone Captain CT - 7567 . The droid ' s data files only verified that the Separatists had gained secret information about the positions of the Republic forces before the head stopped processing , ruining any chances of a further analysis . Despite this , the spy was discovered to be Sergeant Slick , who was apprehended , and General Loathsom ' s droid forces were eventually defeated as well . Characteristics . Like all tactical droids , TJ - 55 stood 1 . 93 meters tall and was far more intelligent than standard battle droids of the Separatist Droid Army and wasn ' t controlled by a computer , allowing him to think and function independently . In battle , he gave his orders from his Armored Assault Tank , but he was also ready to leave his tank and attack with his troops at close combat range , where he used his E - 5 blaster rifle . The droid had the word " TACTICAL " written along the side of his head in Aurebesh , and he also had white photoreceptors and masculine programming . Behind the scenes . TJ - 55 made his first appearance in the television episode " The Hidden Enemy . " He was voiced by James Arnold Taylor , who also provided the voice of Obi - Wan Kenobi and the second tactical droid in the same episode . Even though the droid appeared unnamed in the episode , he was later named as TJ - 55 by his concept art , first presented in . The events surrounding the capture of TJ - 55 ' s head were also humorously portrayed in the non - canon ical video game " " , wherein one of the playable characters — Skywalker , Kenobi , CC - 2224 , or a clone trooper — has to put on the droid ' s head in order to use a special panel and gain access to the arriving gunship to escape from the South tower ' s roof .