What is cool about the original series (episodes 4-6) is that you are witnessing the birth of a new industry. The special effects. Industrial Light and Magic create some of the most amazing effects that you see today and take for granted. When you watch episode 4 remember that when you see those effects, NOTHING like that had ever been done before.
Today when you see a good film with great effects, LOTR, Harry Potter, itís because of Star Wars.