Jonny Lee Miller Sherlock Holmes Actor Lucy Liu Joan Watson Actor Aidan Quinn Captain Thomas Gregson Actor Jon Michael Hill Detective Marcus Bell Actor Desmond Harrington Michael Actor Nicole Shalhoub Dr. Selsky Guest Star Brian Stokes Mitchell Dominic Voth Guest Star Kate Levy Lawyer Guest Star Mark Blum Irvin Langstrom Guest Star Tyler Hanes Midnight Ranger Guest Star Naomi Lorrain Maria Guest Star Briane Keane Walter Petty Guest Star Lynne Winterstellar Victoria Garvey Guest Star Robert Doherty Executive Producer Carl Beverly Executive Producer Sarah Timberman Executive Producer John Polson Executive Producer, Director Jason Tracey Executive Producer Tamara Jaron Writer