The latest Slow Horses finale earns four stars by combining classic espionage thrills with the series’ trademark shambles
Gary Oldman’s Jackson Lamb faces Russian agents, betrayal and a spectacular safe-house shoot-out, while his hopeless team once again stumbles towards saving the day
Aimee-Ffion Edwards gets a memorable James Bond nod involving a harpoon gun, though the honour of firing it falls to Lenny Rush
Kristin Scott Thomas adds authority as MI5 chief Diana Taverner, even when forced into Lamb’s rusty-looking car
Stylish direction and dry humour keep the finale thoroughly entertaining.