Ben Lewis's propulsive thriller starring Siena Kelly, Jack Rowan and Iain de Caestecker.When Jake signs up to a personal training programme that promises to turn the meekest man-boy into an alpha male, he doesn’t have a clue what he’s getting himself into. Two years later, his sister Maya sets out to uncover the truth. Alex … Iain de Caestecker Jerome… Don Gilét Maya … Siena Kelly Beau…Matthew Needham DI Cohen …Chloe Pirrie Jake …Jack RowanOriginal music and sound design by Danny Krass Featuring tracks from Equiknoxx music collectiveWith thanks to Dr Joel Busher at the Centre for Trust, Peace and Social Relations, University of Coventry.A BBC Scotland Production directed by Kirsty Williams