17. Obi-Wan and Vader's Final Battle ('A New Hope')
The master and his star pupil reunite, giving audiences their first, albeit somewhat stiff, look at a light saber duel, and found Obi-Wan making the ultimate sacrifice as he and Darth Vader clash in the corridors of the Death Star. (To be fair, the old Jedi does become one with the Force...so he's got that going for him, which is nice.) Their final contest takes on a different meaning when placed alongside their apocalyptic battle in Revenge of the Sith, but it’s still dynamic and full of gravitas.