Yes but like with other show related themes suggested in the past. The Dr. Who theme would prevent those who don't watch the show from entering. It most likely will not be approved for that reason.
But that does not stop you from making your own special contest apart from the haven's official contest, nor does it prevent you from making a Dr. Who cap for this one.
Realistically, this will not happen for the Nov contest, and that has little to do with the contest theme running now.
Besides, will Nov may be the actual month the show started, this whole year is technically it's 50th anniversary. The writers are planning big 50th anniversary things for it when it returns in April.