Season 5

The 2012 disappearance and murder of 36-year-old childcare worker Elaine O'Hara, whose remains were found on Killakee Mountain in 2013. Detectives detailed how the breakthrough relied heavily on digital footprint analysis and phone tracking that ultimately led to Graham Dwyer.

Covering the tragic 2013 murder of Detective Garda Adrian Donohoe during an armed robbery at the Lordship Credit Union in County Louth.

This episode follows John Reid, former head of the Europol Irish Desk, as he launches a coordinated effort across 19 countries to dismantle the Rathkeale Rovers gang.

Follows the mystery and intense investigation surrounding the bizarre 2013 disappearance and re-appearance of the Irish property developer. Was he a victim of a calculated abduction or the architect of an elaborate mystery of his own making?