Episode A Study in Pink Adaptation: Sherlock Episode: 1x01 Airdate: 25 July 2010 IMDb: A Study in Pink (link not verified) Canon basis: A Study in Scarlet Next: The Blind Banker Cast Benedict Cumberbatch as Sherlock Holmes Martin Freeman as Dr. John H. Watson Mark Gatiss as Mycroft Holmes Una Stubbs as Mrs. Hudson Philip Davis as Jeff Rupert Graves as DI Greg Lestrade David Nellist as Mike Stamford (mentioned) as Harriet Watson Jonathan Aris as Philip Anderson Stanley Townsend as Angelo Lisa McAllister as Anthea Katy Maw as Beth Davenport Vinette Robinson as Sgt. Sally Donovan Tanya Moodie as Ella Sean Joseph Young as Gary Siobhan Hewlett as Helen Louise Brealey as Molly Hooper James Duncan as Jimmy Alison Egan as Jimmy's Mum Lasco Atkins as Late Night Pedestrian Victoria Wicks as Margaret Patterson William Scott-Masson as Sir Jeffrey Patterson Ruth Everett as Political Aide Syrus Lowe as Political Aide Ben Rufus Green as Reporter Pradeep Jey as Reporter Imogen Slaughter as Reporter Peter Brooke as Taxi Passenger Louise Breckon-Richards as Jennifer Wilson