The Ultimate Vampire Resource and Directory

The series starred Stuart Damon as Craig Stirling, Alexandra Bastedo as Sharron Macready and William Gaunt as Richard Barrett. The characters are agents for a United Nations law enforcement organization called "Nemesis", based in Geneva. The three have different backgrounds: Barrett is a code breaker, Stirling a pilot, and Macready a recently widowed scientist and doctor.

During their first mission as a team, their plane crashes in the Himalayas. They are rescued by an advanced civilization living secretly in the mountains, who save their lives, granting them superhuman abilities. The powers include the ability to communicate with one another over distances by ESP (telepathy), and to foresee events (precognition); they also have enhanced senses and reasoning power, and physical abilities up to the extent of human limits.

Many stories featured unusual villains, such as fascist regimes from unspecified South American countries, neo-Nazis or the Chinese. The villains' schemes often threaten world peace — Nemesis's brief is international, so the agents deal with threats transcending national interests. The main characters had to learn the use of their new powers as they went along — keeping what they discover secret from friends and foe alike.