The complete second seaason of the classic 1970s crime series. Bodie (Lewis Collins) and Doyle (Martin Shaw) are two elite officers in the secretive CI5 service, a unit staffed by expert policemen, soldiers and special forces to combat anarchy, terrorism and high-profile crime. In this series, Doyle is assigned to test a new laser-beam rifle, Bodie's girlfriend is critically injured in a terrorist bombing, and the team go up against a rogue agent. Episodes are: 'Hunter/Hunted', 'The Rack', 'First Night', 'Man Without a Past', 'In the Public Interest', 'Rogue', 'Not a Very Civil Civil Servant', 'A Stirring of Dust', 'Blind Run' and 'Fall Girl'.

A dangerous adventure begins for the Doctor and Jo Grant when they visit Stangmoor Prison for a demonstration of the new Keller Machine. The device is said to extract negative emotions from convicted prisoners, leaving them pacified and reformed. But when it apparently goes wrong, a far more sinister purpose is revealed

The Doctor s old enemy, the Master, is behind the machine, working in conjunction with an alien mind parasite. As unrest builds amongst Stangmoor s prisoners, the Master takes control, his ultimate aim to hijack a deadly missile and threaten the World Peace Conference taking place in London. As Brigadier Lethbridge-Stewart leads UNIT in the defense of both the missile and Stangmoor, the Doctor and Jo must fight to stay alive and help avert a third world war "