Oedipus Rex is a 1957 film adaptation of the Sophocles play. I much prefer watching plays to reading them, but I don't care as much for modern adaptations. This is more the filmed play type, with the actors in robes and performing in masks. The adaptation is written by William Butler Yeats. I enjoyed this. And how can you go wrong with a young William Shatner as a member of the chorus!
It's a story everyone should already be familiar with, but you can read a translation of the play online if you like.
DVD Journal says, "Seeing Sophocles' greatest smash hit in a form similar to how his original audiences experienced it is a rare and pretty nifty thing."