The new Netflix thriller I Came By delves into the dark side of a retired judge played by Hugh Bonneville, when he crosses paths with a pair of young graffiti artists.

It's a timely message given the febrile political climate in the UK, but it's a challenge the stars were happy to rise to, as Bonneville and Percelle Ascott explain.

I Came By is in cinemas now and on Netflix from 26 August.