When Shaw arrived at the set for filming, he ran into his friend Ian McDiarmid, the actor playing Emperor Palpatine. When McDiarmid asked him what he was doing there, Shaw responded, "I don't know, dear boy, I think it's something to do with science-fiction." His presence during the filming was kept secret from all but the minimum cast and crew, and Shaw was contractually obliged not to discuss any film secrets with anyone, even his family. The unmasking scene, directed by Richard Marquand, was filmed in one day and required only a few takes, with no alteration from the original dialogue. When the film was re-released on DVD in 2004, a few changes were made: the unmasking scene with Hamill remained mostly the same, but Shaw's eyebrows were digitally removed to maintain continuity with the injuries Darth Vader suffers at the end of '. Shaw's eyes were also digitally coloured to match Hayden Christensen's, who portrayed Anakin in ' and "Revenge of the Sith".