Ian McDiarmid (born 11 August 1944) is a Scottish actor and director best known for portraying Emperor Palpatine in the Star Wars film series. He has received an Olivier Award for Best Actor and a Tony Award for Best Featured Actor in a Play for his performances. Wikipedia
Obi-Wan is now living on Tatooine, so he can watch his future Padawan Luke Skywalker, son of his former apprentice Anakin Skywalker now known as Darth Vader.