In June 2021, armed Gardaí carried out a search at a hostel on Gardiner Street in Dublin. They arrested a 37-year-old man named Mark Wolf. He had a sordid past. He was a wanted man in the UK. So how did gardaí find him? And what dark obsessions was he harbouring?

Presented by John Sweetman

Created by Darren Cleary

Episode Written by Darren Cleary

Script Edited by Eoin Brennan

Produced by Siobhan Walsh

Produced by Siobhan Maguire

Executive Produced by Eoin Brennan

Executive Produced by Ruth Fitzsimons

Sound Design and Editing by Neil Kavanagh

Audio Editing Support by Ed Smith

Marketing Support by Laura Bracken and Róisín Reilly

Social Support by Mark Hayes and Robyn Ree

Artwork and Graphics by Eric Rowntree