Wade Thorne is the lead agent of The Specialists.
This group is a private Intelligence organization, put together by a rich electronics magnate, and former Director of the CIA, named Marshall. It was created because he had during his tenure with the Agency come to feel that more could be done in the fight with terrorism and tyranny. Governments were hampered by bureaucracy, timidity, and often personal inclination, agendas, or greed. He strongly felt that evil grows in the absence of a watchful, vengeful hand. With his group of Specialists, that hand was the six people from an assortment of sources and each with considerable skill and experience.
Thorne is the leader and by far the main character in the series, although the others play vital co-starring roles. Thorne is an ex-CIA agent having served for eight years until a KGB agent killed his family. Thorne's drive and interest in the fight died with his family and he said goodbye to the Agency. He was brought from retirement and given a chance to fight back at evil. He was tasked with putting together the team that Marshall wanted.
The others in the group are:
Kat Killinger: a former FBI agent
Ichi Yamagata: also an FBI agent who is an expert with swords
Roger Johnson: a much decorated African-American SEAL
Hershel Levine: a computer genius from Mossad
Duncan Bancroft: an MI-6 agent with contacts around the world.
These five people follow Thorne as he takes the fight that Marshall was funding to the enemy rather than wait for the enemy to strike on its own terms. The only rules that Thorne has to play by is to destroy the danger and to win. He and his people are very good at doing that.