Jonny Lee Miller Sherlock Holmes Actor Lucy Liu Joan Watson Actor Aidan Quinn Captain Thomas Gregson Actor Jon Michael Hill Detective Marcus Bell Actor John Noble Mr. Morland Holmes Actor Daniel Reece Guest Star Michael Mosley Guest Star Richard Portnow Guest Star Robert Petkoff Guest Star Casey Predovic Guest Star Eric Anderson Guest Star Lisa Datz Guest Star Otto Sanchez Guest Star Al Sapienza Guest Star Stephen Singer Guest Star Robert Doherty Executive Producer Carl Beverly Executive Producer Sarah Timberman Executive Producer John Polson Executive Producer Jason Tracey Executive Producer Paul Cornell Writer Seith Mann Director