Prison 9pm, Channel 4
The first series of Paddy Wivell’s terrifyingly intimate look at life behind bars felt like one of the most unsparing depictions of prison life ever seen on the small screen. The director clearly gained the trust of inmates and authorities alike and the result was documentary television of real depth, nuance and compassion. Tonight, he returns us to HMP Durham for a second series. He begins by focusing on a seemingly never-ending cycle of violence between prisoners. Is such brutality unavoidable in institutions of this nature?