The week in TV: DI Ray; The Staircase; The Dry; Prisoner C33

‘Hits uncomfortable, all-too human notes’: Parminder Nagra, left, as DI Ray. ITV Photograph: ITV

DI Ray (ITV) | itv.com
The Staircase (Sky Atlantic) | sky.com
The Dry (BritBox) | britbox.co.uk
Prisoner C33 (BBC Four)| iPlayer

At some point, television will reach a state of detective-show saturation and the entire genre will collapse into a gurgling, subscriber-only sinkhole. For now, there’s ITV’s DI Ray, the latest of several female-led series – Vigil, Trigger Point – from the Line of Duty production stable (I have Jed Mercurio pegged as a secret feminist). Created and written by Maya Sondhi (Line of Duty’s PC Bindra), DI Ray ran over four consecutive nights last week, with Parminder Nagra (Bend It Like Beckham, ER) as Detective Inspector Rachita Ray.