Jonny Lee Miller Sherlock Holmes Actor Lucy Liu Joan Watson Actor Aidan Quinn Captain Thomas Gregson Actor Jon Michael Hill Detective Marcus Bell Actor Nelsan Ellis Shinwell Johnson Actor Samantha Quan Guest Star Laura Heisler Guest Star Anna Khaja Guest Star Ishmail Bashey Guest Star Quincy Dunn-Baker Guest Star Dan Ziskie Guest Star Eddie McGee Guest Star Flor De Liz Perez Guest Star Todd Lawson Guest Star Bill Dawes Guest Star Ruffin Prentiss Guest Star Sam Breslin Wright Guest Star Pia Haddad Guest Star Robert Doherty Executive Producer Carl Beverly Executive Producer Sarah Timberman Executive Producer John Polson Executive Producer Jason Tracey Executive Producer Celeste Chan Wolfe Writer Jerry Levine Director