Revenge of the Sith, Palpatine wasn't always supposed to wield a red lightsaber, instead it was nearly a different color.

Obi-Wan Kenobi may have ruined Palpatine's plans, but it's not widely known the exact extent he went to do so.

Revill voiced Emperor Palpatine in the original version of "The Empire Strikes Back" released in 1980, before Ian McDiarmid was cast in the role. In a scene from the "Star Wars" sequel ...

Revill provided the voice. Revill and Eaton did not return to portray Palpatine in the 1983 sequel, “The Return of the Jedi.” Scottish actor Ian McDiarmid was cast to play the villain.