Possible Clues:

• Obi-Wan's apprentice
• Darth Vader's first name
• Darth, before he turned to the Dark Side
• Luke Skywalker's dad
• Luke and Leia's father
• Luke Skywalker's father
• A Skywalker
• One of the Skywalkers
• Luke's father in 'Star Wars'
• 'Revenge of the Sith' role