SilverWook said:
As Vader never says Leia’s name out loud, does he only sense Luke has a sister, but not her actual identity?

I always thought this was the case, because there is no way anyone involved wouldn’t have written in some sort of recognition on his part that his daughter was the very woman he kidnapped, tortured, imprisoned, let free, and then got his boss’s office blown up. And THEN she was trapped, her boyfriend was tortured, and she was set to be kidnapped again!

He knows damn well who Leia Organa is, he would have said something if he knew that the “sister” was that woman, right? Especially since, at that point, he has no reason to play anything close to the chest in that regard.

edit: while I’m joining the wall-crawling party - Return of the Jedi is obviously a reference to Luke, and always was a reference to Luke, even when it was called “revenge.” - the story is focused on him. Yes it can also be interpreted in other ways, which is cool, but it seems really obvious to me, looking at all the behind-the-scenes info collected over the last 30 plus years, that the intention was always for this last Star Wars movie (at the time) to be ABOUT LUKE, and the title always reflected that, even when it changed and changed back. Luke is the Jedi that is returning. He’s also the “New Hope” that’s being referenced in ANH’s retroactively applied title. 2 out of the 3 OT movies are literally NAMED after him (which is fine, the OT was originally supposed to be “The Adventures of Luke Skywalker.”

It’s why Lucas retroactively trying to say the OT + PT is Anakin’s story, and always was Anakin’s story, is such bunk.