BBC One has released the first trailer and photo for the upcoming series Strike, based on the Cormoran Strike novels written by Robert Galbraith, a pseudonym used by J.K. Rowling. The Cuckoo's Calling (published by Little, Brown) is the first in the Cormoran Strike series and J.K. Rowling's first crime novel written under the pseudonym Robert Galbraith. It will be the first of three separate event series, with The Cuckoo's Calling (3x60 minutes) debuting on August 27 on BBC One, followed by The Silkworm (2x60 minutes) and Career Of Evil (2x60 minutes), although dates for the other event series' have not been released.

The trailer comes from BBC One YouTube, although it isn't clear when these event series' will debut in the U.S. BBC One struck a deal with HBO to air these shows in the U.S., although no specific premiere dates were given. Tom Burke stars as Cormoran Strike, a war veteran turned private detective operating out of a tiny office in London's Denmark Street. Though he's wounded both physically and psychologically, Strike's unique insight and his background as an SIB Investigator prove crucial to solving three complex cases which have eluded the police. Holliday Grainger plays Robin, assistant to Strike. Though she begins as a temporary secretary, managing Strike's chaotic life, she soon becomes involved with his caseload and begins to see her true potential.

The Cuckoo's Calling was published to critical acclaim in 2013 and went on to be a global bestseller, followed in 2014 by The Silkworm and Career Of Evil in 2015. All three books were number one Sunday Times bestsellers in both hardback and paperback and Little, Brown has sold in total over four million copies worldwide across all editions. Cormoran Strike is one of the most memorable and distinctive detectives in crime fiction today and Robert Galbraith is among the genre's most celebrated writers, shortlisted for the prestigious CWA Gold Dagger in 2015 and the Theakston Old Peculier Crime Novel Of The Year in 2016.

This marks a continuation of the BBC's relationship with Brontë Film and TV and J.K. Rowling. Brontë Film & TV produced J.K. Rowling's The Casual Vacancy, a three-part serial which aired on BBC One in 2015, starring Michael Gambon, Rory Kinnear and Emily Bevan. A BBC One mini-series, in association with HBO/Cinemax, adapted from J.K. Rowling's global bestselling novels written under the pseudonym Robert Galbraith. The new Strike series is written by Ben Richards and directed by Michael Keillor.

The first episode follows Robin Ellacott, a newly engaged 20-something temp from Yorkshire, is sent to the Denmark Street offices of private investigator Cormoran Strike. It is an awkward first meeting. Then John Bristow arrives. He believes that his adopted sister Lula was murdered and the police have overlooked key evidence. Penniless, and effectively homeless after separating from his girlfriend, Strike takes the case. The cast also includes Elarica Johnson as Lula Landry, Leo Bill as John Bristow, Brian Bovell as Derrick Wilson, Tara Fitzgerald as Tansy Bestigui, David Avery as Nico Kolovas-Jones, Tezlym Senior-Sakutu as Rochelle Onifade and Martin Shaw as Tony Landry. Take a look at the first trailer and photo for Strike below.