Quiller (1975) HD E7 "Target North" - Michael Jayston, Sinead Cusack, Moray Watson

Quiller is sent to Scotland to look into the death of Sir Michael Foster. Evidence of a recent explosion alerts him to a group of Scottish Nationalists who are planning a bombing campaign. The ep. is starring Michael Jayston, Sinead Cusack, Moray Watson, Bill Simpson, John Lee, Kurt Christian, James Cosmo, Rpbert Coleby, Joe Dunlop.
Quiller is a fictional character created by English novelist Elleston Trevor. Quiller, whose one-word name is a pseudonym, works as a spy, and he is the hero of a series of Cold War thrillers written under the pseudonym Adam Hall, and became Trevor's most popular character. The books concern a solitary, highly capable operative who works, usually on his own, for a British government organization, referred to as "The Bureau", which "doesn't exist".