<P> Lucas fleshed out the Emperor in the prequel films . According to Lucas, Palpatine's role in The Phantom Menace is to explain "how Anakin Skywalker came to be Palpatine's apprentice" and the events that lead to his rise to power . The true identity of Darth Sidious--the phantom menace--is left a mystery, and his relationship to Palpatine is not clear, though popular consensus agreed that Darth Sidious and Palpatine were one and the same . Film critic Jonathan L. Bowen remarks, "Debates raged on the Internet concerning the relationship between Darth Sidious and Senator Palpatine . Most fans believed the two characters are actually the same person with logic seeming to support their conclusion ." Bowen notes that the debate was fueled by the fact that "suspiciously Darth Sidious does not appear in the credits ." </P> <P> In Star Wars and History published by Lucasfilm, it describes Palpatine's consolidation of power as being similar to the Roman political figure Augustus, named Octavian before renaming himself . Both legitimized authoritarian rule by saying that corruption in the Senate was hampering the powers of the head of state; both pressured the Senate to grant extraordinary powers to deal with a crisis, falsely claiming that they would rescind those powers once the crisis was over; and both relied on their strong control over military force . </P> <P> When the Emperor first appeared in The Empire Strikes Back, he was portrayed by Marjorie Eaton under heavy makeup . Chimpanzee eyes were superimposed into darkened eye sockets during post-production "in order to create a truly unsettling image". The character was voiced by Clive Revill . The makeup was sculpted by Phil Tippett and applied by Rick Baker, who initially used his own wife, Elaine, for the makeup tests . </P> <P> "With Kershner," Revill said, "you had to keep the reins tight--you couldn't go overboard . It was the perfect example of the old adage' less is more'--the Emperor doesn't say very much . But when he finally appears, it's at a point in the saga when everyone's waiting to see him . It's the Emperor, the arch villain of all time, and when he says there's a great disturbance in the Force, I mean, that's enough oomph!" Years later, during production of Revenge of the Sith, Lucas decided to shoot new footage for The Empire Strikes Back to create continuity between the prequels and original trilogy . Thus, in the 2004 DVD release of The Empire Strikes Back Special Edition, the original version of the Emperor was replaced by Scottish Shakespearean actor Ian McDiarmid, and the dialogue between the Emperor and Darth Vader was revised . </P>

Who played the original emperor in empire strikes back