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 
On ne peut rien gagner sans perdre; même le paradis exige la mort.
