Trivia: While not as beset by disasters as Lucas's previous movie American Graffiti, there were some setbacks. Firstly, filming in Tunisia was delayed when the region experienced its first winter rainstorm in fifty years. Getting R2-D2 to work also proved very problematic, and at one point it started picking up Tunisian radio signals.
Trivia: Special Edition Only: There was a problem with the new scene with Jabba. Harrison Ford walks around the person who portrays Jabba, but when they digitally replaced the character with Jabba, he couldn't because of the tail, so he walked through him. George Lucas fixed the problem by making him step on the tail.
Trivia: Anthony Daniels is the only cast member of the trilogy to voice his character in the trilogy's National Public Radio's dramatizations (while Mark Hamill and Billy Dee Williams voiced their characters for "The Empire Strikes Back," they were replaced in "Return of the Jedi" by Joshua Fardon and Arye Gross, respectively).
Trivia: The interrogation droid has a protruding metal object at the top that resembles salad tongs. These are Simpson forceps, which have been used for centuries to deliver babies. Certainly a torture device if the expectant mother has no anesthesia.
Trivia: Just before the film's completion, Mark Hamill was cast as David Bradford on the TV series "Eight is Enough." Hamill believed the film was going to be a hit, and wanted to focus on his film career. Hamill played David in the series' pilot, and was replaced by Grant Goodeve for the rest of the show's run.
Trivia: The Stormtrooper guns are actually British Sterling MK. IV submachine guns.
Trivia: George Lucas wanted to do a Flash Gordon remake, but couldn't obtain the movie rights and developed Star Wars in its stead - hence the opening title sequence. Following the success of Star Wars, the owners of Flash Gordon decided to make a movie after all. Released in 1980, the same year as The Empire Strikes Back, it flopped.
Trivia: When they power-up the Death Star, the control panel is a Grass Valley switcher, production equipment which is still prevalent in television stations everywhere.
Trivia: The sounds of the doors banging in the Death Star were actually the big shutters which open and close the big dome at Mount Palomar Observatory in California.
Trivia: I believe it is at the house of Obi Wan Kenobi in the background you can see, on a table or shelf, part of a Volkswagen heater duct. It's a part of the car that goes under the rear seat. Most people wouldn't know what it is. It's black and standing vertically on the table