The British government has created the Counter-Measures group, a specialist team that investigates strange phenomena and dangerous technology. This box set contains four of their adventures plus a behind-the-scenes documentary.

'Manhunt' by Matt Fitton: Group Captain Gilmore is on the run for murder; Sir Toby is dealing with his unctuous new assistant, Templeton; and Allison and Rachel are investigating a bizarre series of deaths across the country. A maniac is on the loose, but for Counter-Measures it's business as usual.

'The Fifth Citadel' by James Goss: People are falling ill near Holborn and displaying a sickness with all the hallmarks of radiation poisoning. While Gilmore and Allison look into a graveyard, Sir Toby and Rachel venture underground to meet an old friend with a desperate scheme.

'Peshka' by Cavan Scott and Mark Wright: A visit to an international chess tournament isn't quite the relaxing experience the Counter-Measures team might have hoped for. With a defection to arrange and violence erupting on the streets, it's time for a dangerous gambit. What pieces will be left on the table when the endgame approaches?

'Sins of the Fathers' by John Dorney: When a massacre results from the ruins of an old case, it poses more questions than it answers. But with Sir Toby stonewalling, Gilmore and Rachel are forced to investigate alone. The past is catching up with Counter-Measures. With decades-old secrets about to be revealed, can anyone survive the fallout?

Written by Matt Fitton, James Goss, Mark Wright & Cavan Scott, John Dorney. Directed by Ken Bentley.