Derek talks to Brendan about his introduction to psychiatry, 'Hearing Voices: The History Of Psychiatry In Ireland' and the work that went into it, asylums in Ireland, his book 'In Search of Madness: A Psychiatrist's Travels Through The History Of Mental Illness', the history of lobotomies, 'The Science Of Happiness' and his appearance on 'The Tommy Tiernan Show"!