Office politics take precedence over national issues when Sir Humphrey and Bernard fall out with each other after Jim tries to restrict Sir Humphrey's access to No 10.
Hacker threatens to place Sir Humphrey on leave while a security inquiry looks into why he cleared a confessed Soviet spy many years earlier, so Sir Humphrey retaliates with a dog in distress on Salisbury plain.
Sir Humphrey makes Jim suspicious of the Minister of Employment when he needs the PM's support in opposing a plan to shift military personnel from the south to the north of England.
Sir Humphrey makes a very strange ally out of the formidable Agnes Moorhouse, a radical political reformer from a London council, in his efforts to stop Hacker's plans to make local government more democratic.
Sir Humphrey works against Hacker over the issues of funding the National Theatre when the PM asks for help containing criticism from the Theatre's director.
Sir Humphrey faces a conflict of interest when Hacker devises a plan to improve educational standards by abolishing the Department of Education and Science.
Sir Humphrey has to decide if he will support the PM or inform Parliament when Hacker denies knowledge of a wiretap authorized by his office without his knowledge.