How many doctor whos can there be?

The Doctor is the protagonist of the British science fiction television series Doctor Who. The character was created by Sydney Newman and C. E. Webber, and first appeared in the 1963 episode "An Unearthly Child". The Doctor is a Time Lord, a race of beings who can travel through time and space. The Doctor has had many different faces over the years, each played by a different actor. The current Doctor is played by Jodie Whittaker.

The number of Doctor Whos there can be is theoretically infinite, as the Doctor can regenerate their body when they are mortally wounded. However, in practice, the number of Doctor Whos is limited by the number of actors who are willing and able to play the role.