Forget going out: 3 TV shows to watch in September, from Helen Mirren's gangland must-see to the return of Slow Horses

Gary Oldman in Slow Horses and Helen Mirren in MobLand.

As a TV writer, nothing excites me more than sharing my favourite TV shows with other people, and finding out someone else has also watched and loved a film or series I'm obsessed with.

There really is nothing better than endless conversations about perfectly written characters, jaw dropping or totally implausible plot lines, and the frustration of cliff hangers.