The Doctor Who transition took place in last year’s Christmas special, which marked Whittaker’s first, albeit brief, appearance as the Thirteenth Doctor.
David Tenant signed off as the Tenth Doctor nearly a decade ago, back in 2010.
This paved the way for Jodie Whittaker to play the Thirteenth Doctor.
He finished his run just last year, ending his time as the Twelfth Doctor in 2017.