Kim Philby: Under Threat from the FBI (Ep 2)

What you'll learn

• 1 (00:38) **Episode Setup: Philby’s Precarious Position** - David and Gordon recap Kim Philby’s high-stakes role as MI6 head of station in Washington, where he is compromising CIA/MI6 covert actions into Eastern Europe while his chaotic personal life (heavy drinking, houseguest Guy Burgess) threatens to unravel everything.
• 2 (05:05) **The Venona Project: The West’s Deepest Secret** - The hosts explain the Venona code-breaking operation, a joint US-UK effort to decrypt intercepted Soviet wartime telegrams, which is so sensitive that even President Truman was not told about it.
• 3 (08:51) **Philby’s Unbelievable Access to the Hunt** - Despite the secrecy, Philby is brought into the Venona project because it’s a joint operation and some leads point to British sources, meaning he literally stands over the shoulder of the lead codebreaker.
• 4 (11:34) **The Homer Investigation Closes In** - The investigation into the spy codenamed Homer narrows from all embassy staff to a shortlist, and Philby realizes it is his Cambridge-recruited colleague, Donald Maclean.
• 5 (14:36) **Donald Maclean’s Spectacular Crack-Up** - Maclean, the golden boy of the Foreign Office and a committed Marxist ideologue, begins to self-destruct under the pressure of his double life, engaging in violent, drunken, and erratic behavior.
• 6 (19:10) **The Decisive Venona Breakthrough** - By spring 1951, a new Venona decrypt provides a specific biographical detail: Homer’s pregnant wife was staying with her mother in New York, which points directly at Maclean.
• 7 (22:16) **The Fateful Decision: Guy Burgess as Courier** - Philby decides to use the erratic Guy Burgess to get a warning to Maclean, a choice that will prove catastrophic for the spy ring.

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