Jonny Lee Miller Sherlock Holmes Actor Lucy Liu Joan Watson Actor, Director Aidan Quinn Captain Thomas Gregson Actor Jon Michael Hill Detective Marcus Bell Actor Rhys Ifans Mycroft Holmes Guest Star Henri Lubatti Marchef Guest Star Vincenzo Amato Guillaume de Soto Guest Star Tim Guinee Dean McNally Guest Star Michael Gaston Kurt Yoder Guest Star Max Van Bel Jem Guest Star Andrew Halliday Mr. Hostetler Guest Star Nambi E. Kelley Ms. Stone Guest Star Ty Jones Deron Guest Star Joseph Thompson Leader Guest Star Tyler Evans NSA Agent Guest Star Robert Doherty Executive Producer Carl Beverly Executive Producer Sarah Timberman Executive Producer Craig Sweeny Executive Producer Robert Hewitt Wolfe Writer