Farewell Great Macedon was an unproduced six-episode First Doctor serial by Moris Farhi which was commissioned by David Whitaker for the first season of Doctor Who in 1964. The story featured the Doctor, Ian, Barbara and Susan encountering Alexander the Great in Babylon. Work stopped on the scripts when Farhi felt that the story editor was asking for too many changes that would have compromised the historical accuracy of the scripts. The script was later adapted for audio by Nigel Robinson and then produced for Big Finish Productions, thereby becoming part of the official timeline.