ThisserieschronicledthelivesofBodieandDoyle,topagentsforBritain'sCI5(CriminalIntelligence5),andtheircontroller,GeorgeCowley.ThemandateofCI5wastofightterrorismandsimilarhigh-profilecrimes.Cowley,ahardex-MI5operative,hand-pickedeachofhismen.Bodiewasacynicalex-SASparatrooperandmercenarywhosenaturerantocontrolledviolence,whilehispartner,Doyle,cametoCI5fromtheregularpoliceforce,andwasmoreofanopenmindedliberal.Theirrelationshipwasoftencontentious,buttheywerethetopmenintheirfield,andtheonestowhomCowleyalwaysassignedtothetoughestcases.