Manchán spoke to Matt about Dervla Murphy.
Dervla Murphy, now in her eighties, is Ireland's most prolific travel writer.
An extraordinary talent, a trailblazer, she cycled from Ireland to India in 1963 - yet many people have never heard of her.
'Who is Dervla Murphy?’ opens exclusively in Ireland at Movies@Dundrum and SGC Dungarvan on April 23rd.
Manchán spoke at length to The Last Word earlier.
Listen back here: