 Sir Mark tries to intimidate the Hacker and Sir Humphrey by suggesting he could track down where the first leak came from (and thereby implicate them).However, Hacker replies that he could likewise find out where the leak for the PM's opposition to their plan originated, pointing out that a leak from the PM's office would, in terms of security, be more serious than one from a Cabinet Minister's private office.Hacker further points out that the inevitable public outcry over the leaks would make his job impossible, especially as all his proposals have been effectively denied.