Peter starts having nightmares about being tortured by enemy spies. At the office, Peter is asked what he knows about a Dr. Volganyn. Peter has read a paper by this scientist theorizing about an invisible radio system - a completely undetectable listening device. The scientist, who is Soviet, is defecting and giving the secrets of the listening device to the British. Since the Russians know all the safe houses, the new guy, Piglet, is suckered into hosting this person at his house. Wondering what he will tell his wife, Sarah, he comes up with the story that the guy was one of his school classmates and that they played football together, but it turns out the defector is female. This creates some awkwardness between Peter, Sarah and Dr. Volganyn, whose first name is Nadia. Peter leaves the house briefly to pick up some lager, warning Sarah to be careful, but when he returns Sarah is gone. The Soviets, in an attempt to retrieve Volganyn, kidnapped the wrong woman. Lubenkov, an official wi (thetvdb.com)