In the wake of Kim Philby's escape to Moscow, his closest friend in MI6 is un...
A Spy Among Friends
Season 1 Episode 3: Allegory of the Catholic Faith
Philby begins to understand that the KGB can never fully trust him now that he is in Moscow, and as far as they're concerned, his life as a spy for them is over; in London, Elliot warns Anthony Blunt that his cover has been blown.