Martin Compston has deservedly become a British television star for his work on Line of Duty. His portrayal of AC-12 stalwart Steve Arnott is constantly entertaining, as Steve handles everything but the kitchen sink while he and his team pursue corrupt police officers. But it's such a great show that audiences may not realize how much Compston has done outside of the BBC series.
Source：https://www.cbr.com/best-martin-compston-roles-not-line-of-duty/
