Warning! Spoilers ahead for Obi-Wan Kenobi episode 6!
The last two Star Wars cameos in Obi-Wan Kenobi'sseason finale carry incredibly deep meaning for both Kenobi and Darth Vader himself. Coming in the aftermath of their second lightsaber duel, Obi-Wan and Vader have evolved more into the versions they'll become in A New Hope. As such, both cameos serve to evolve Kenobi and his corrupted apprentice even further towards that point, carrying major significance concerning their shared past and future in the Star Wars canon.
In Obi-Wan Kenobi episode 6, Kenobi decides to leave young Leia and the resistance cell known as the Path, hoping to lure the pursuing Vader and the Empire away to give them a chance at survival. Of course, Darth Vader's obsession with destroying his former master sees him taking the bait, diverting course to go after Kenobi. This results in their second lightsaber duel that's far more epic than their first seen in Obi-Wan Kenobi episode 3, especially after Obi-Wan decides to reconcile with his past and self-perceived failings with Anakin Skywalker, rebalancing himself in the Force as the Jedi he once was. Seeing his apprentice and brother as truly dead with Vader standing in his place, Kenobi leaves Vader behind and returns to Tatooine.
Related: Obi-Wan Kenobi Season 1 Ending Explained (In Detail)
Following their duel, Obi-Wan and Darth Vader respectively encounter their masters in the final scenes of the new Star Wars series. Obi-Wan finally communes with the Force ghost of his master Qui-Gon Jinn while Darth Vader reports to Emperor Palpatine from his fortress of Mustafar. However, both cameos are far more important and go deeper than simple fan service, affecting the trajectories of Kenobi and Vader
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