Nearly ten years in the making, This Man Alone is a brand-new feature-length documentary on one of television's highest-rated series. Featuring a remarkable central performance by Edward Woodward, Callan grew from a cult favourite into one of Britain's favourite shows, and this documentary tells the story of its creation and development, its success on television and extended life in film and books. Narrated by Peter Woodward, This Man Alone features contributions from Peter Mitchell, Reginald Collin, Mike Vardy, James Goddard, Piers Haggard, Patrick Mower, Trevor Preston and more
David Callan, secret agent, is called back to the service after his retirement, to handle the assasination of a german businessman, but Callan refuses to co-operate until he finds out why this man is marked for death.
Washed-up agent John Craig is given the task of proving his worth by tracking down a Russian scientist on the run. Cross and double-cross is the name of the game.