THE DOCTOR IS REGENERATING OMGZ. We know. This only happens every few years, and that doesn't count the more than fifteen years the show wasn't on. This is EPIC. Originally just a way for the show creators to keep everything going when William Hartnell got too old to continue, now it is really a huge part of what makes the Doctor THE DOCTOR. Every time a great Doctor leaves, fans get sentimental about their all-time favorites. We've crunched the numbers and perused the fan forums to come up with this list, ranking all of the Doctors from our least favorite to most bestest of all.