I have a question for Star Wars historians. When Lucas outlined the story of what would eventually become the original trilogy, and I mean before Episode IV was even filmed, do you think he had already decided that Darth Vader was going to be Luke's father? Was that always part of the story or did he come up with that huge revelation when he was given green light to make Episode V? I've always thought, and correct me if I'm wrong here, that judging by what Obi Wan tells Luke about Anakin, there's no way anyone could have seen that one coming, even if I've heard people say they did figure out who Luke's father was, before The Empire Strikes Back was first released. What Obi Wan says makes perfect sense and does not sound far-fetched: your father was killed by a Jedi who was seduced by the Dark Side. Period. So what happened? Did Lucas decide to make Vader Luke's father while coming up with the plot for Episode V or was that revelation part of the story all along? Does anyone know?