Some of the early episodes of "Doctor Who" i.e. those with William Hartnell or Patrick Troughton as the Doctor.

There was a film made of Doctor Who, which starred Peter Cushing as the Doctor. It wasn't up to the standard of some of the TV episodes, I'm afraid.

Jon Pertwee wasn't a bad Doctor, but I think Roger Delgado as his foe, the Master, rather stole the show whenever he appeared. And Tom Baker appears to be saddled forever with his portrayal of the Doctor, which is still parodied on Radio 4 (in the UK).