"Sherlock’s" Molly Hooper has gone from being somewhat of a joke to a fan favorite. She has gotten to slap and kiss Sherlock Holmes; we’ve even seen her portrayed as a mustachioed, Victorian doctor in “The Abominable Bride.” So, how will Molly Hooper surprise us next? Actor Louise Brealey discusses her quirky character and teases Season 4 just in time for the January 1st "Sherlock" premiere.