http://www.imdb.com/title/tt5116280/?ref_=fn_al_tt_1
The Secret is the story of a real-life double murder. James Nesbitt plays Colin Howell, a respectable dentist and pillar of the community, who became a killer in partnership with a Sunday school teacher, Hazel Buchanan, played by Genevieve O'Reilly.
First episode is out, and it's really quite good.
Hope you'll enjoy it too 
"Music washes away from the soul the dust of everyday life." ~Berthold Auerbach
