Warning: This episode contains spoilers for Episode One of the Fourth Season of Sherlock.

"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.

Sherlock’s Amanda Abbington Weighs in on the Premiere

MASTERPIECE Studio is your backstage pass to the PBS series—from Sherlock to Poldark. After the show, turn off the TV and tune in to MASTERPIECE Studio for the scoop with host Jace Lacob. Listen for exclusive interviews with the cast and crew of your favorite shows. Get the history lowdown behind the people and places you see on screen, and hear revealing stories from the set. MASTERPIECE Studio is made possible by Viking Cruises and Raymond James. Sponsors for MASTERPIECE on PBS are Viking Cruises, Raymond James, and The MASTERPIECE Trust.