Cathal outside the Irish Film Institute, Temple Bar, originally the Meeting House of the Religious Society of Friends (Quakers), where the black abolitionist, Frederick Douglass, addressed a public meeting in 1845 at the invitation of ‘the Liberator’, Daniel O’Connell.

Cathal Brennan has a BA in History from Trinity College, Dublin where he specialised in early twentieth-century Irish history. He also has third level qualifications in Media Production (Marino College), TV and Video Production (Dún Laoghaire Institute of Art, Design and Technology) and Research Skills for TV (Screen Training Ireland). He has worked as a researcher on Who Do You Think You Are? (BBC, RTÉ and NBC versions), The Children of the Revolution (RTÉ) and The Great House Revival (RTÉ). He is co-presenter (with John Dorney) of The Irish History Story podcast