Season 1
- 1The Costa Killer3 May 2017
- 2Ireland's Jihadi Jane10 May 2017
- 3Gunning Down a Godfather17 May 2017
- 4Gary Campion7 Jun 2017
- 5Sharon Collins14 Jun 2017
- 6Michael Boyle21 Jun 2017
In this new 6-part series, Donal MacIntyre & Prof David Wilson take us on a shadowy journey inside the minds of Ireland's contract killers.