In the concluding episode of the series, six trainees remain on the course but only four of them will make it through to the final test overseas: exercise solo. This final challenge, a mission on foreign soil, has been designed to recreate the conditions for operating as an intelligence officer in a hostile environment.
Dispatched to Marrakech, the final four must work entirely alone. Unknown to them, Control are also in the city and watching their every move as they move between locations and are given limited instructions.
Spies Thursday 9.00pm on Channel4.