SPY is the story of Tim, a single father trying to win back the respect and affections of his horribly precocious nine year old son, Marcus. In the hope of proving that he is not a complete loser, Tim quits his dead-end job but his life changes forever when he is accidentally recruited as a trainee spy for MI5. Tim (Darren Boyd) struggles as he attempts to juggle family life and his professional life without his secret being discovered, least of all by Marcus. Supervising Tim at work is irrepressible MI5 boss, The Examiner, played by Robert Lindsay who teaches the recruits his own unorthodox approach to the espionage game. Adding to the chaos of Tim's life are his acidic ex-wife, Judith (Dolly Wells), her enthusiastic new boyfriend Philip (Tom Goodman) and his anti-social friend Chris (Mathew Baynton). And romance may be in the cards for Tim in the form of fellow spy Caitlin (Rebekah Staton) provided she can let her guard down long enough, or perhaps if he's really unlucky he may fall into the web of psychopathic obsessive social worker, Paula (Rosie Cavaliero).