Brackett's treatment, delivered on February 21, 1978, was similar to the final film, but with Anakin Skywalker appearing as a ghost to instruct Luke and Vader as a separate character. Lucas was disappointed with Brackett's draft, but he was unable to discuss it with her, as she died soon after. Without Brackett, Lucas had to write the next draft himself. It was this draft where Lucas first made use of the "Episode" numbering for the films; "The Empire Strikes Back" became "Episode II". He also used the plot twist that Darth Vader was Luke's father. According to Lucas, he found this draft enjoyable to write, as opposed to the yearlong struggles writing the first film, and quickly wrote two more drafts, all in April 1978.