Ultra British thriller.
Secret courts judge an alleged terrorist on secret evidence, while the lawyers for both sides cut through the red tape to find what happened. People get miffed while keeping their upper lips squarely stiff.
There are also polite hitmen who soliloquise, backstabbing mentors, foot chases through London back alleys. Hitmen using piano wires, Hitman-style.
Riz Ahmed can’t catch a break. He is either the terrorist or the Spy covering up for terrorists on the MI5 payroll.