Review: Witnesses (S1 E3/6), Wednesday 5th August, Channel 4

We’re hitting the half way stage of this excellent French drama and already the villains have been unmasked. A long way to being caught, yes, but unmasked and identified nonetheless. This a brave way to go for any series, and Witnesses has changed quickly from a whodunit to a cat-and-mouse game, with Kaz Gorbier (and…