alt Hacker NewsThis reminded me of the (real life) story of Oleg Gordievsky, the FSB officer who was a double agent for the west[1]. He was alerted to the fact that the FSB were on to him and had been in his apartment because there were three locks on his front door but he never locked one of them as he didn’t have the key. He came home one day to find all three were locked.
[1] read “The spy and the traitor” by Ben Mackintyre. It’s incredibly gripping and at times hard to believe the courage and perseverance of the people involved but it was real.
And if that tickles your fancy, "Tinker Tailor Soldier Spy" [0] is an excellent miniseries from 1979 about a mole in MI6, perhaps the best spy series ever made. I didn't care about the movie much, so don't let this deter you, but Alec Guiness as George Smiley is a perfect match. John Le Carré thought so, too.
Oh and Patrick Steward plays "Karla" the soviet mastermind in this series and its successor "Smiley's People". Just a few seconds, but very memorable, its incredible really.
[0] https://www.imdb.com/title/tt0080297/