An ancient and legendary Sith Lord, it was Darth Bane who saw that the Sith traditions of old were ultimately a dead end. All too often, squabbling Sith in their bid for power upended carefully laid plans. After the Sith were decimated by the Jedi Knights of a thousand years ago, Bane enacted the Sith rule of two: there would be only two active Sith at one time -- a Dark Lord to embody the power, and an apprentice to crave it. These Sith would operate in the shadows, favoring guile and conspiracy to bring down their opponents rather than brute force -- that is, until it was time to rise and subjugate the galaxy.
An ancient order of Force-wielders devoted to the dark side, the Sith practice hate, deception, and greed. Notable for their red-bladed lightsabers, black dress, and use of their aggressive feelings, the Sith look to amass power at all costs. The evil Darth Sidious, along with his apprentice Darth Vader, achieved the Sith goal of galactic conquest after a millennia of plotting.
A resourceful astromech droid, R2-D2 served Padmé Amidala, Anakin Skywalker and Luke Skywalker in turn, showing great bravery in rescuing his masters and their friends from many perils. A skilled starship mechanic and fighter pilot's assistant, he formed an unlikely but enduring friendship with the fussy protocol droid C-3PO.
Scheming, powerful, and evil to the core, Darth Sidious restored the Sith and destroyed the Jedi Order. Living a double life, Sidious was in fact Palpatine, a Naboo Senator and phantom menace. He slowly manipulated the political system of the Galactic Republic until he was named Supreme Chancellor -- and eventually Emperor -- ruling the galaxy through fear and tyranny.