Pirate Predator tells the story of Eamon Cooke, a man of many faces who, on one hand, became a cult like figure - filling a void for disillusioned youth through Radio Dublin in the 1970s and 1980s- while on the other became one of Ireland's most prolific child sexual abusers.

Narrated by Peter Mulryan, who encountered Cooke in the 1980s, Pirate Predator uncovers the chilling true story of 'Captain Cooke' and how he used the cover of pirate radio to groom and abuse, hiding a decades-long reign of terror in plain sight.

This series features scenes of child sex abuse. If affected by any issues raised, please visit rte.ie/helplines

If you have any information or knowledge about this story, please email us documentaries@rte.ie.

Previous RTÉ Documentary On One series include Stolen Sister, Where is Jón?, The Real Carrie Jade, Runaway Joe, Finding Samantha, First Consignment, GunPlot, Tiger Roll and The Nobody Zone.