TV Series | | Crime, Drama, Mystery
David Callan is the top agent/assassin for the Security Service (British counterintelligence), but he is an embittered man who performs his duties "for Queen and country" under duress. This... See full summary »
The series theme tune was 'Girl in the Dark', a stock library track by Jack Trombey published by de Wolfe Music. In 1970 Edward Woodward released a vocal cover of the piece, 'This Man Alone', with lyrics by Peter Dacre.
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