A book 'The Coldest of Wars' is due to be published about 'Cold War' espionage. When Piglet reveals that his wife Sarah, who works for a publisher, has just been reading a manuscript by the same name, he and Dexter are ordered to intercept before it hits the shops.

Questions of loyalty are asked when a former agent returns and points the finger of suspicion at Maxwell.

All of a sudden, Piglet has a drinking problem...and a gambling problem...and financial difficulties...and marital strain. What's going on? Well, Drummond has ordered him to put on the show as a ploy to see if Maxwell is a KGB mole.

Which is better, MI5 or MI6? After a disastrous training exercise, Drummond is challenged by his MI6 counterpart to answer that very question.

MI5 has acquired a Russian decoding device, but it won't work. Piglet uses his electronics skills to try to understand why.

Piglet has been encouraged to get very close to a female KGB operative. What steps must he take to make sure his wife doesn't find out?

Piglet and his colleagues are attending a foreign Embassy reception. As they attempt to plant some bugs, terrorists storm the party and take guests hostage. Can Piglet and Dexter save the day?