Father Brown is based on G. K. Chesterton's detective stories about a Catholic priest who doubles as an amateur detective in order to try and solve mysteries.

Leanne and Rhona are two ordinary flatmates whose lives are thrown into disarray after witnessing a gangland shooting. They find themselves whisked into witness protection, given new identities and left to fend for themselves in a grubby flat Swindon - and all before they can so much as collect their toothbrushes. Staying undercover doesn’t prove easy…