The Rest Is Classified The Rest Is Classified

198. Kim Philby: Interrogated by MI5 (Ep 3)

Oct 4, 2026 · 50m

Summary

This episode details Kim Philby’s return to London in 1951, where he faces intense scrutiny from MI5 and pressure from the CIA to leave MI6. The narrative explores the conflicting investigations, highlighting the rivalry between MI5’s Arthur Martin and MI6’s defenders, while Philby endures harsh interrogations and a period of personal decline. As the 1950s progress, the "Third Man" theory gains traction, leading to Philby’s name being exposed in Parliament and his subsequent public denial. The story also examines the impact of spy fiction on real-life investigations and the tragic mental he…

Topics discussed

Introduction: The suspicion of Kim Philby Sponsor segments: HP, Wise, and NordVPN Philby returns to London and faces initial suspicion Interrogations with Dick White and the 'Third Man' theory CIA memos: Harvey vs. Angleton on Philby's guilt American pressure forces Philby's removal from MI6 Philby's erratic behavior and the 1951 black cab incident Arthur Martin and the MI5 mole hunt strategy The Milmo interrogation and Soviet radio traffic evidence Milmo's conclusion: Philby is a Soviet agent MI6's defense of Philby and the Red Scare context Philby's reputation among MI6 colleagues Sponsor segments: Tremfya and Zepbound Aileen Philby's mental health crisis and suspicions Surveillance, isolation, and the mechanics of mole hunts The 'Third Man' label and Graham Greene's influence The 1955 parliamentary inquiry and Foreign Secretary's statement Philby's press conference: A masterclass in deception Philby's return to journalism and MI6 support Conclusion and preview of the final confrontation
Listen ad-free on Castria