Jonny Lee Miller Sherlock Holmes Actor Lucy Liu Joan Watson Actor Aidan Quinn Captain Thomas Gregson Actor Jon Michael Hill Detective Marcus Bell Actor Ophelia Lovibond Kitty Winter Guest Star Zuzanna Szadkowski Miranda Jantzen Guest Star Madison Riley Courtney Stever Guest Star Rachel Hilson Lexi Guest Star Katie Finneran Barbara Conway Guest Star Christopher Innvar Grant Perryman Guest Star Olivia Nikkanen Tess Jantzen Guest Star Robert Doherty Executive Producer Carl Beverly Executive Producer Sarah Timberman Executive Producer Craig Sweeny Executive Producer Brian Rodenbeck Writer John Polson Director