It takes a very special actor to play the Doctor. With legions of Doctor Who fans of all generations spanning the globe, it propels anyone in the job into unparalleled stardom.
It's one of the most sough-after and scrutinised roles on TV - with an elite list of acclaimed actors taking on the mantle over the years.
An ingenious solution to a change in actor was made when the first ever Doctor left in 1966, giving the Time Lord the ability to regenerate into a new body.
With the surprise news that Jodie Whittaker is quitting the show being announced on Sunday, the hunt is now on to find her replacement.
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