I actually agree with Joss. I think that's a perfectly legit criticism of ESB. You can make a movie that's a middle part of a trilogy and a homage to serials while still having a strong self contained main plot. None of the other SW movies had a problem pulling it off. I love the OT and think SW and ESB are the height of film-making, but ngl, ESB had a weak plot. Ironically, though, it was the fact that Kershner felt he was directing a movie without a beginning or end that led him to emphasize and develop the characters, which is part of what makes ESB so great.