The second
Doctor on the show
Doctor Who.
Er... he often wore a large fur coat. Started the whole Doctor does physical comedy thing. Bounced around with Zoe (wolf whistle), Jamie (the best companion ever:), and assorted others.
There was a big, like 12 parts big, regeneration series for him that led to Jon Pertwee being stuck on Earth. Real cool multiple time zone war thing. A current whovian should elaborate.