John Barton is a fictional character from the British soap opera Emmerdale, played by James Thornton. The actor was asked to audition for the part and he called it the "most frightening audition" he had ever done. Thornton won the role of John, who was introduced to Emmerdale along with his family as part of an overhaul of the show by the series producer Gavin Blyth. The Barton family took over the running of Butler's Farm and they were described as being "sexy, modern and contemporary". Thornton made his debut screen appearance during the episode broadcast on 17 July 2009. The following year, he signed a one-year extension to his contract. In November 2011, Thornton revealed that he was to leave Emmerdale after three years and he departed on 16 February 2012. Shortly before he arrived on-screen, Blyth described John as being "a very charismatic and modern farmer." He was a family man, who was honest and hard-working. Kate Woodward of Inside Soap called him "ruggedly handsome" and said he had a heart of gold. Thornton called his character a "proper bloke", who was quite moral. John and his family moved to the village to make Butler's Farm a success. John was good at business and employed a modern approach to farming. He and his wife, Moira (Natalie J. Robb), were childhood sweethearts and their marriage was initially solid. However, John shared a kiss with Eve Jenson (Suzanne Shaw) and two years later Moira had an affair with Cain Dingle (Jeff Hordley). John struggled to forgive Moira for her infidelity, but eventually realised that he could not be without her.