No. of Segments:
12 mins approx
A danger packed series of espionage and romance featuring two adventures with top security agent, Guy Marriott.
Using all his skill and daring, Guy Marriott first solves the mystery of The Black Diamond, and then is hurled headlong into the savage maelstrom of Operation Tiger.
Although London-based, Marriott covers lots of territory – first to the Outer Hebrides of Scotland where the Black Diamond is discovered and finally to America and the small town where electronic security equipment is being manufactured for a nuclear conference.