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 Edoardo Ballerini Agent Lukas Muller Guest Star John Shea Bill Wellstone Guest Star Reed Diamond Joel Fitzgerald Guest Star Jakob Von Eichel Pierre Gagnier Guest Star Michael Esper Donald Pruitt Guest Star Celia Keenan-Bolger Amber Bova Guest Star Joel Marsh Garland Manager Guest Star Ted Koch Mr. Adler Guest Star Andrew Breving Executive Guest Star John Jellison Old Man Guest Star Will Cobbs ESU Officer 1 Guest Star Jonathan Sale Another ESU Officer Guest Star Robert Doherty Executive Producer Carl Beverly Executive Producer Sarah Timberman Executive Producer John Polson Executive Producer Jason Tracey Executive Producer, Writer Aaron Lipstadt Director