Jonny Lee Miller Sherlock Holmes Actor Lucy Liu Joan Watson Actor Aidan Quinn Captain Thomas Gregson Actor Jon Michael Hill Detective Marcus Bell Actor Sean Pertwee Gareth Lestrade Guest Star Sarah Goldberg Miss Truepenny Guest Star Bill Irwin Richard Balsille Guest Star Maggie Lacey Michelle Forrester Guest Star Bhavesh Patel Neetzan Mehmet Guest Star Parker Pogue John Bowden Guest Star Rosalyn Coleman Hotel Manager Guest Star Justin Morck ESU Leader Guest Star Robert Jimenez Orderly Guest Star Robert Doherty Executive Producer Carl Beverly Executive Producer Sarah Timberman Executive Producer Craig Sweeny Executive Producer, Writer Bob Goodman Writer Guy Ferland Director