Using the Doctor's own life force, Omega travels back into Gallifrey's past to stop himself from making Time Lord history - but at what cost for both the Doctor and the planet?
Did You Know?
This story is the first to be cast after an open audition process. Some 300 applicants put themselves forward for roles in this special and the 6th season. Over 600 story lines were submitted in a similar open writing submission held a few months before. See more