Luke momentarily lashes out with his lightsaber , but Vader blocks his strike , with father and son battle again .
Vader brings Luke to the second Death Star orbiting around Endor , where his master , Emperor Palpatine , tries to tempt Luke to the dark side .
Luke momentarily lashes out with Luke 's lightsaber , but Vader blocks his strike , with father and son battle again .
Vader brings Luke to the second Death Star orbiting around Endor , where his master , Emperor Palpatine , tries to tempt Luke to the dark side .