Merlin's father, Balinor in the episodes The Last Dragonlord and The Diamond of the Day of the BBC drama series, Merlin.
- John is the eldest of 5 children, he was educated at St. Colman's College, Newry, and Central School of Speech and Drama, London.
- John has a sister, Susan Lynch, who is an established actress in London. Along with appearing in Roan Inish she was also in Interview with the Vampire and an episode of the British crime series Cracker.
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