Kanan Jarrus, Ezra Bridger and former Jedi apprentice, Ahsoka Tano went on a mission to the planet Malachor in an attempt to gain knowledge on the Sith and the Inquisitors, just before they arrived; Vader had dispatched Eighth Brother who had landed on the planet just before the Jedi to search for the former Sith Lord, Maul.
Before the mission occurred, Kanan Jarrus and Ezra Bridger had been hunted by the Inquisitors; making it nearly impossible for them to help the Rebellion to establish a base. Seeking answers, Kanan and Ezra along with Ahsoka Tano traveled to the Jedi Temple on Lothal to seek answers from Master Yoda. While Yoda counseled the Jedi against fighting the Galactic Empire, Ezra was determined to continue helping the Rebellion. Yoda then advised Ezra and his companions to travel to Malachor. Millennia earlier, the planet had been the site of a great battle between the Jedi and the Sith which had ended in both sides being destroyed.
After helping the Phoenix Squadron to establish Chopper Base on Atollon, Kanan, Ezra, Ahsoka, and C1-10P traveled on the Phantom to Malachor. Despite Rex's offer to assist them, Ahsoka insisted that this mission was for the Jedi alone. She believed that the planet contained "forbidden knowledge" that would help them to defeat the Sith and their Inquisitors.
Arriving on Malachor, Chopper picked up a ship's signal while the Jedi arrived at a set of obelisks with strange writing. While Ahsoka attempted to read the writing, Ezra touches the obliesks and they fall to the underground, having found a Sith Temple.
While passing through an ancient battlefield littered with ossified bodies and lightsabers, they were ambushed by the Inquisitor known as the Eighth Brother. During the ensuing skirmish, the Inquisitor used his double-bladed spinning lightsaber to fire at Ezra, causing the ground beneath him to collapse, separating him from Ahsoka and his master.
While Ahsoka and Kanan pursued the Eighth Brother, Ezra tried to find his way out of the tunnel. Shortly thereafter, he encountered the former Sith, Maul who introduced himself as "Old Master". While Ezra was initially distrustful of the stranger and suspected that he was a Sith, Maul managed to convince him by telling him that he was also seeking the same knowledge, in order to avenge the crimes that the Sith had perpetrated against his late mother and brother. Ezra was able to sympathize with Maul's plight due to his own grievances against the Empire for taking away his home and parents.
Together, the two managed to force their way through the Sith Temple. After a challenging trial involving the use of Force, Ezra and Maul managed to obtain the Sith holocron. Meanwhile, Kanan and Ahsoka managed to captured the Eighth Brother with the help of Chopper, who used the Inquisitor's own TIE Advanced v1 against him. After interrogating him, he reveals he's hunting "A Shadow", who was Maul. Together, Kanan and Ahsoka led their captive to the Sith Temple, but were soon ambushed by the Fifth Brother and Seventh Sister. The Jedi and Inquisitors engaged in a lightsaber duel.
A Temporary Alliance
At this point, Maul and Ezra stumbled upon the two opposing parties. Using his lightsaber, Maul helped Kanan and Ahsoka to drive the Inquisitors away. While Kanan and Ahsoka distrusted Maul, Ezra argued that Maul could be trusted and recounted how they had worked together to obtain the Sith holocron. Following a tense meeting, Maul managed to convince Kanan and Ahsoka to work together by pointing out that the Inquisitors would have alerted Darth Vader to their presence. Maul then tricked his Jedi allies into helping him carry out his plan to plant the holocron in the temple's obelisk; claiming that it would give them the knowledge to destroy the Sith.
Believing that Maul intended to destroy the Sith, the Jedi and Ahsoka agreed to assist him on his mission. While Ezra was convinced by Maul, Kanan still harbored his suspicions of the former Sith. As the four travelers climbed the obelisk, Kanan took the opportunity to pull Ezra aside and warn him that Maul could not be trusted. Ezra in turn accused Kanan of holding him back and responded that Maul knew his potential. On the way up, the two Jedi were ambushed by the Eighth Brother, who knocked out Kanan and attempted to steal the Sith holocron. Before the Inquisitor could harm Ezra, Maul arrived and drove off the Inquisitor.
With the Inquisitors after them, Maul convinced the Jedi and Ahsoka to split up. Despite Kanan's objections, Ezra decided to accompany Maul to the top of the obelisk. During the journey, Maul took the opportunity to sow discord between the Padawan and his master. Shortly after, they were attacked by the Seventh Sister and her ID9 Seeker Droids. Fighting together, the Jedi and former Sith managed to dispatch the seeker droids and overpower the Inquisitor. While Maul held the Seventh Sister suspended in mid-air, he encouraged Ezra to kill her. When Ezra refused, Maul killed the Inquisitor himself and chided the Jedi for his hesitation.
Maul then told Ezra to continue alone to the top of the obelisk while he went to the aid of Kanan and Ahsoka. Arriving at the scene, Maul took on the Fifth and Eighth Brother. Ahsoka managed to slash the Fifth Brother's lightsaber, causing him to drop it and allowing Maul to kill the Inquisitor with a slash through the torso. Meanwhile, Kanan managed to damage the Eighth Brother's lightsaber. The surviving Brother then attempted to flee using his spinning lightsaber to fly, but the weapon malfunctioned and the Inquisitor plummeted to his death below. Having eliminated the Inquisitors, Maul then turned on his Jedi allies.
Showdown with Darth Vader
When Kanan demanded to know where Ezra was, Maul took the opportunity to blind the Jedi Knight with his lightsaber. Before Maul could finish off Kanan, Ahsoka attacked him with her lightsabers. During the duel, Maul revealed that the temple was actually a powerful battle-station capable of destroying all life and that he planned to use it to exact his revenge on all his enemies. Despite being blinded, Kanan managed to muster enough energy to don a Jedi Temple Guard's helmet and rejoined the battle. Seeing him, Ahsoka proceeds to taunt Maul, telling him that he would have to defeat Kanan before he could challenge her. After telling Ahdoka to find Ezra, Kanan managed to throw Maul off the edge of the temple. He then contacted Chopper and told him to bring the Phantom to pick them up.
Meanwhile, Ezra managed to plant the holocron in the temple's obelisk. He was immediately greeted by a female entity known as "Presence", who revealed the temple's true function. When Ezra expressed revulsion, Presence told the young Jedi that she would instead share the power with someone else more worthy. At that moment, Vader arrived on his TIE Advanced x1. The Sith Lord then attacked Ezra and quickly bested him in combat; destroying Ezra's lightsaber in the process.
Before Vader could finish off Ezra, Ahsoka arrived and confronted the man who had once been her Master. Following a hostile reunion, Ahsoka vowed to avenge Anakin by killing him. While Ahsoka and Vader dueled, Kanan and Chopper arrived on the Phantom. Working together, Ezra and Kanan managed to remove the holocron from the temple's obelisk; causing the battlestation to abort its firing mechanism. Their actions instead triggered an explosive implosion that destroyed the temple.
As the temple closed in on itself, Ezra and Kanan attempted to make their way back to the Phantom. However, they were held back by Vader who used the Force to pull them back. However, Ahsoka intervened and gave the two Jedi enough time to flee with Chopper. During the fight, Ahsoka managed to damage Vader's helmet; exposing her master's scarred face. Unable to leave the man who had once been Anakin, Ahsoka chose to stay behind with Vader. Meanwhile, the Jedi and Chopper managed to escape and headed back to Atollon. The Sith temple imploded behind them and the Jedi believed that Ahsoka had perished during the temple's destruction.
The two distraught Jedi and Chopper returned to Chopper Base where they informed the other rebels about the loss of Ahsoka. Kanan was compelled to cope with his new blinded state. Meanwhile, Ezra's encounter with Maul on Malachor triggered the young Jedi's interest in the dark side of the Force. While in his room, Ezra took the opportunity to open the Sith holocron; a feat that could be accomplished by someone who had tapped into the dark side. Unknown to the rebels, Vader and Ahsoka had in fact survived the destruction of the Sith temple. While a wounded and exhausted Vader exited the damaged temple, Ahsoka headed back inside the temple.
- "Twilight of the Apprentice" (First appearance)