Obi-Wan Kenobi is a series that's definitely delivered its fair share of surprises over the course of its first five episodes, but the finale had moments we're sure left many jaws on the floor.
Shortly after being defeated by Obi-Wan (you can read more about that by clicking here), we find Darth Vader back on his throne inside that castle on Mustafar. The furious Sith Lord vows to find Kenobi and destroy him, but his new Master, Emperor Palpatine, seems to have a different take. Yes, Ian McDiarmid reprises the role for a cameo as the iconic villain via hologram.
Pointing out that Vader seems "agitated," Palpatine wonders if Vader's thoughts are clear on this matter and suggests his feelings for his old Master have left the Sith Lord weakened. It's then he appears to threaten his apprentice, saying "If your past cannot be overcome..."
The Emperor never finishes his threat, but based on how he's treated Vader in various comic book tie-ins, we're sure the villain knows what Palpatine is getting at here. After all, each of the Sith Inquisitors is eagerly waiting in the wings to take his place! Vowing to only serve the Emperor, Vader says Kenobi means nothing and that's where we leave him.
Has his hunt for Obi-Wan truly ended? If so, it might explain why he felt he was now the Master when they clashed again in A New Hope, but the door may be open for further stories.
Elsewhere in this finale, Ben eventually returns to Tatooine and is travelling through the desert to what we assume will be the home he makes for himself by the time Luke crosses paths with him again years later. A Force Ghost suddenly greets Ben, and it's Liam Neeson's Qui-Gon Jinn! He wonders what took his old Padawan so long and says he was always there; Obi-Wan just wasn't ready to see him.
With that, they set off together, likely to begin the training that will eventually see Obi-Wan become more powerful than Vader could ever possibly imagine.