There was a false page in the original script in order to fool all of the people working on the film. This was to keep it secret that Darth Vader was Luke's father. Only George Lucas, the producers and James Earl Jones knew the truth. Mark Hamill was told just moments before filming this scene so his reaction would be right, while David Prowse read the lines from the original script "Obi-Wan killed your father." See more...
Popular blog posts:
Other great sites
Star Wars: Episode V - The Empire Strikes Back (1980) - 183 mistakes
Directed by Irvin Kershner, starring Alec Guinness, Anthony Daniels, Billy Dee Williams, Carrie Fisher, David Prowse, Frank Oz, Harrison Ford, James Earl Jones, Kenny Baker, Mark Hamill, Peter Mayhew (add more)
Continuity: Widescreen version: When Leia, Han, Chewbacca and C-3P0 are first walking through Cloud City, as Han says to Lando, "You sound like a businessman", Chewbacca is walking behind Leia. In the next shot, he is ahead of her, and then seems to walk to the side to wait for her. In the following shot, he is behind her again.
Continuity: After Leia, Han and Chewbacca walk down the stairs in the carbon-freezing chamber, as the shot ends, Han is turning towards a stormtrooper behind him. In the next shot, he is turned in a different direction, and Leia's head is facing another way. The position and existence of some of the people around them changes between the two shots as well.