He then encounters Obi - Wan Kenobi , an old hermit .
When R2 - D2 goes missing , Luke goes out to search for the droid , but is knocked out by Tusken Raiders in the process .
Luke then encounters Obi - Wan Kenobi , an old hermit .
When R2 - D2 goes missing , Luke goes out to search for the droid , but is knocked out by Tusken Raiders in the process .