Jonny Lee Miller Sherlock Holmes Actor Lucy Liu Dr. Joan Watson Actor Aidan Quinn Capt. Tobias "Toby" Gregson Actor Jon Michael Hill Detective Marcus Bell Actor Natalie Dormer Jamie Moriarty Guest Star Dominic Fumusa Jordan Conroy Guest Star Michael Aronov Andrej Bacera Guest Star Austin Lysy Chad Lerberg Guest Star Arnold Vosloo Christos Theophilus Guest Star Justine Cotsonas Jovana Bacera Guest Star Karen Ludwig Melanie Waters Guest Star Robert Doherty Executive Producer, Writer Sarah Timberman Executive Producer Carl Beverly Executive Producer Michael Cuesta Executive Producer Craig Sweeny Writer John Polson Director