John Finbar "Barry" Cassin (23 November 1924 – 14 January 2017) was an Irish television, stage and screen actor. On stage, he is best known for his role in the production of Twelve Angry Men.On screen, Cassin played mostly secondary roles such as in the television series Mystic Knights of Tir Na Nog and the 2012 film Byzantium. He introduced the works of John B. Keane and notably directed the first stage production of The Field. Cassin's daughter, Anne, is a well-known journalist and news presenter for Raidió Teilifís Éireann.