At times this is in danger of tripping over it's own cloak and stabbing itself, but Richard Johnson ("Wilde") still just about manages to keep it interesting for ninety minutes. He is a British secret agent who is charged with bumping off a Czech scientist who has defected to join the CIA in the UK. Needless to say, this is not going to be a straightforward quest - and it only becomes more complicated when he discovers that there is an whole network of people in whom he is uncertain he can trust. Those duplicitous individuals include his own boss "Canning" (Harry Andrews) and a host of…