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 Jordan Gelber Guest Star Alexander Chaplin Guest Star Kathleen McNenny Guest Star April L. Hernandez Guest Star Robert Petkoff Guest Star Michael Eaddy Guest Star Tim Bohn Guest Star Ro Boddie Guest Star Andhy Méndez Guest Star Steve Rosen Guest Star Tommar Wilson Guest Star Robert Doherty Executive Producer Carl Beverly Executive Producer Sarah Timberman Executive Producer John Polson Executive Producer Jason Tracey Executive Producer Nick Thiel Writer Jeffrey Paul King Writer Jeremy Webb Director