Given that the Master’s regeneration into Missy set the precedent of Time Lords regenerating into Time Ladies, it’s entirely possible that the next Doctor will be female.
When the show returns for the Christmas special, fans will have to say goodbye to Peter Capaldi as Twelve and Steven Moffat as showrunner.
If you need some shows to watch between now and Christmas, our 2017 Netflix guide and our summer TV premiere schedule can help you out.