Obi-Wan had already known that Anakin had 'turned to the dark side' and had become the Dark Lord Darth Vader. (he realized this shortly after he did [see episode III])
Darth Vader
Definitely Darth Vader
Darth Vader
Darth Vader
Definitely Darth Vader
Darth Vader
dark vader is.
Darth Vader actually is Luke's father.
Darth Vader would win. He can use the force.
the force
Darth Vader
Darth Vader