The episode titles "1964", "1966", "1967", "1970", "1974", "1979", "1984", "1987" and "1995" were the years in which the action took place. Many of these (1964, 1966, 1970, 1974, 1979 and 1987) were years in which General Elections took place in the UK, against which the events of the episodes were set.