With young British actor Matt Smith stepping into Doctor Who 's title role , Wired.com takes a look back at the 10 actors who have previously portrayed sci-fi TV 's most enduring hero .
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young british actor matt smith step doctor title role wired.com take look 10 actor previously portray sci-fi tv endure hero
With young British actor Matt Smith stepping into Doctor Who 's title role , Wired.com <m> takes a look </m> back at the 10 actors who have previously portrayed sci-fi TV 's most enduring hero .
With young British actor Matt Smith stepping into Doctor Who 's title role , Wired.com <m> takes a look </m> back at the 10 actors who have previously portrayed sci-fi TV 's most enduring hero .