'London Spy'

Here's a terrific 2016 5-part BBC series I happened on recently.

No car chases, no gunfights, no drones.

Very, very different from most spy thrillers in that there's little violence and technology, instead a slow unpeeling of layer after layer of misdirection and subterfuge and one surprise after another.

Thoroughly engrossing and absorbing.

Also an absolutely terrific cast.

Wikipedia has much more if you don't mind knowing before watching, or if you prefer not to/can't watch.