So I was watching ESB the other day and found myself wondering what exactly Vader planned to do with Leia and Chewbacca after Lando turned the crew over to him Although we as viewers are not privy to what the conditions of the original deal Vader had with Lando were, it can be assumed that they were probably free to go since Lando says that their having to stay in Cloud City was "never part of our agreement". But after having ordered Lando to keep them in Cloud City indefinitely, Vader (as I am sure you all remember) later alters the deal to have Leia and Chewbacca brought to the Executor. My question is what did Vader plan to do with them once they were there? Try to turn Leia to the darkside as well and have Chewie killed? Or simply kill them both? Additionally, why did Vader keep altering the deal? What prompted him to keep changing his mind on what to do with them? His repeated attempts to gain custody over them obviously shows that he had some interest in having them in his power. I haven't read the ESB novelization so perhaps it is explained in more detail there. Thoughts?