Every day, Britain’s Secret Intelligence Services are fighting an invisible war against a multitude of hidden threats.
In this series, three former spies are putting a group of 15 men and women to the test to see if they have the skills and qualities required for that battle.
‘Spies’ sees them go through a series of exercises based on the Intelligence Officer New Entry Course – an intense, unsettling psychological experiment run by people who’ve been through the real thing.