Series 13 Filming Date Suggests Another Long Gap
According to attendees at this year’s Gallifrey One convention, producer Tracie Simpson revealed that pre-production on Series 13 begins in June 2020, with filming not starting until September 2020.
Filming on a series traditionally takes between 9-10 months to complete, then you factor in post-production. That logistically means the absolute earliest we could see Series 13 would be autumn 2021.
One consolation: there is still one special that has already been filmed that will air some time between Series 12 and 13.