Lady Mary toughens up in new role
7 January 2014 Last updated at 12:01 GMT
Michelle Dockery swapped the English countryside for the city streets in a new Funny or Die sketch. In the spoof, Dockery plays Detective Connie Tough, opposite crime drama vet Michael Chiklis, for a new police drama, "Tough Justice."
Dockery is better known for her role as Lady Mary in Downton Abbey.
The first episode of Downton Abbey's fourth season was watched by 10.2 million people in the US on Sunday, a record for a series premiere on PBS.