The six-parter series will be showing on BBC One shortly, I don't have the exact date but I'm guessing it'll fill the Sunday evening slot.
There is an interview with Jason Isaacs on the BBC website.
Kate Atkinson’s Jackson Brodie character is to come to TV screens next year in a new adaptation for BBC1.
“Case Histories” will be a six-part series adapted from the Transworld author’s mystery novels Case Histories, One Good Turn and When Will There Be Good News? The stories revolve around private detective Brodie, who will be played by Jason Isaacs, who was Lucius Malfoy in the Harry Potter movies.