I saw the OT during its initial release (1977 - 1983). And I never really gave it much thought until now. Please follow my thought process here, it's a little bit convoluted, I know.
(Remember,this all before the 1999 TPM Sith Rule of two, etc)
In TESB, Vader tries to get Luke to join him, and together defeat the Emperor and then rule the galaxy as father and son. I believe Vader was sincere in this scene, and if Luke had surrendered to Vader, then Vader would not have just "delivered" him to the Emperor and risk being replaced himself. Which implies that Vader cannot defeat the Emperor on his own, and he is willing to betray his Master to gain power (or possible just to escape from its grip?)
In ROTJ, We learn early on that the Emperor is aware that Vader desires to seek after Luke. "Patience, my friend" Certainly, Palpatine would have thought that the two of them might team up to overthrow him, right?
Then, Vader realizes that Luke is on shuttle Tydirium (and Luke knows that Vader is present on the Star Destroyer). Rather than stick a tractor beam on the shuttle, bring it in, and capture everyone on board, Vader lets it go so the Rebels can start their plan. Which implies that either Vader was conflicted about what to do (i.e. let the Rebels attack the second death star) or capture Luke now, quickly, and defeat the Rebel plan before it ever gets underway. In other words, Vader seems willing to let the Rebels potentially attack the death star rather than nipping it in the bud right now. Why risk that possibility?
Then, Vader has a guilty conscience and goes back to the death star to personally tell Palpatine that the Rebels have landed on the moon (which Palpatine already knows). When Vader reveals that Luke is with them, Palpatine is surprised that he himself did not sense Luke's presence. "I wonder if your feelings are clear on this matter, Lord Vader" Palpatine has to be a little bit concerned at this point.
When Luke later hands himself over to Vader on the moon of Endor, he offers Vader a chance to join him and change. Vader refuses, and delivers him to Palpatine. Why not team up with Luke, hatch a plan to both attack Palpatine on the death star together? At one point, that is clearly what Vader wanted.
When Luke lashes out at Palpatine with his saber, Vader blocks the blow. Again... why?
Vader seems mostly impotent throughout ROTJ up until the very end. Has he resolved himself to the fact, after the events of TESB, that he cannot take down Palpatine or rule in his place? Wouldn't he have known that, once Palpatine had Luke as an apprentice, Vader would be the first to go? So, by handing Luke over to Palaptine, he was signing his own death certificate.
OK, I need some sleep.....
(Remember,this all before the 1999 TPM Sith Rule of two, etc)
In TESB, Vader tries to get Luke to join him, and together defeat the Emperor and then rule the galaxy as father and son. I believe Vader was sincere in this scene, and if Luke had surrendered to Vader, then Vader would not have just "delivered" him to the Emperor and risk being replaced himself. Which implies that Vader cannot defeat the Emperor on his own, and he is willing to betray his Master to gain power (or possible just to escape from its grip?)
In ROTJ, We learn early on that the Emperor is aware that Vader desires to seek after Luke. "Patience, my friend" Certainly, Palpatine would have thought that the two of them might team up to overthrow him, right?
Then, Vader realizes that Luke is on shuttle Tydirium (and Luke knows that Vader is present on the Star Destroyer). Rather than stick a tractor beam on the shuttle, bring it in, and capture everyone on board, Vader lets it go so the Rebels can start their plan. Which implies that either Vader was conflicted about what to do (i.e. let the Rebels attack the second death star) or capture Luke now, quickly, and defeat the Rebel plan before it ever gets underway. In other words, Vader seems willing to let the Rebels potentially attack the death star rather than nipping it in the bud right now. Why risk that possibility?
Then, Vader has a guilty conscience and goes back to the death star to personally tell Palpatine that the Rebels have landed on the moon (which Palpatine already knows). When Vader reveals that Luke is with them, Palpatine is surprised that he himself did not sense Luke's presence. "I wonder if your feelings are clear on this matter, Lord Vader" Palpatine has to be a little bit concerned at this point.
When Luke later hands himself over to Vader on the moon of Endor, he offers Vader a chance to join him and change. Vader refuses, and delivers him to Palpatine. Why not team up with Luke, hatch a plan to both attack Palpatine on the death star together? At one point, that is clearly what Vader wanted.
When Luke lashes out at Palpatine with his saber, Vader blocks the blow. Again... why?
Vader seems mostly impotent throughout ROTJ up until the very end. Has he resolved himself to the fact, after the events of TESB, that he cannot take down Palpatine or rule in his place? Wouldn't he have known that, once Palpatine had Luke as an apprentice, Vader would be the first to go? So, by handing Luke over to Palaptine, he was signing his own death certificate.
OK, I need some sleep.....