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 Jill Flint Alysa Darvin Guest Star Becky Ann Baker Pam Guest Star Frank Wood EROC Supervisor Guest Star Candis Cayne Ms. Hudson Guest Star Karl Miller Squatter Guest Star Bill Buell Private Maggio Guest Star Howard McGillin Davis Renkin Guest Star Andy Grotelueschen Nurse Vince Guest Star Christina Rouner Denise Castor Guest Star Robert Doherty Executive Producer Sarah Timberman Executive Producer Carl Beverly Executive Producer Michael Cuesta Executive Producer Jason Tracey Writer Andrew Bernstein Director