Skeptoid

Skeptoid #1017: The Bell that Tolls for the K-129

December 2, 2025

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  • The central mystery explored in Skeptoid #1017: The Bell that Tolls for the K-129 is how the CIA obtained the K-129's ship's bell, as evidence suggests the recovery mechanism (Clementine) failed before it could reach the bell's location in the sail/conning tower area. 
  • The official account of Project Azorian states that the CIA only recovered a 38-foot section of the bow, which contained the remains of six sailors and two nuclear torpedoes, making the later return of the bell inconsistent with the documented recovery failure. 
  • Research into former Soviet and Russian submariners suggests the bell's location was not fixed, as it was often removed before diving and stored at the personal discretion of the boatswain, potentially explaining why it was found in the recovered forward section. 

Segments

Project Azorian Overview
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(00:00:03)
  • Key Takeaway: The CIA’s Glomar Explorer operation in 1974 aimed to raise the wreck of the Soviet submarine K-129, leading to questions about the extent of the actual recovery.
  • Summary: The Glomar Explorer attempted to raise the K-129 wreck in 1974 as part of Project Azoria. Rumors persist that the CIA recovered more secrets than officially admitted. The episode focuses on the mystery surrounding the ship’s bell from this Cold War incident.
Skeptoid Podcast Introduction
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(00:00:30)
  • Key Takeaway: Skeptoid aims to separate fact from fiction, science from pseudoscience, and real history from fake history to aid in better life decisions.
  • Summary: The show introduces its mission to distinguish verifiable reality from falsehoods across various topics. The host, Brian Dunning, sets the stage for analyzing the K-129 incident.
Return of the Bell
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(00:02:49)
  • Key Takeaway: In 1993, US Ambassador Mac Toon presented the K-129’s ship’s bell to Russian officials, solidifying Russian belief that the US recovered the entire submarine.
  • Summary: The bell was presented to the Russians during a minor meeting of the US-Russia Joint Commission on POWMIA Affairs in Moscow. This act occurred 19 years after the initial recovery attempt. The bell’s existence is considered the central mystery of the operation.
K-129 Sinking and Discovery
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(00:03:21)
  • Key Takeaway: The K-129 sank in 1968 in the North Pacific, and the US located it using AFTAC hydrophones that detected two explosions.
  • Summary: The submarine sank at 16,000 feet, too deep for Soviet recovery technology at the time. The USS Halibut mapped the wreck, revealing it split in two near the sail, with one intact nuclear missile tube remaining.
Project Azorian Recovery Plan
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(00:05:04)
  • Key Takeaway: Project Azorian involved designing the Hughes-Glomar Explorer with a massive internal cargo hold to lift the 1,750-ton forward half of the K-129 using a mechanism named Clementine.
  • Summary: The cover story identified the ship as a seafloor mining vessel nominally owned by a Howard Hughes company. Clementine was lowered to secure the sub’s forward section for a three-mile ascent.
Recovery Failure and Aftermath
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(00:06:29)
  • Key Takeaway: During the ascent, Clementine’s claws fractured, causing three-quarters of the target section to fall back to the seabed, leaving only a 38-foot bow section.
  • Summary: The failure meant the CIA could only retrieve the incomplete bow, missing key intelligence targets like the encryption gear. This failure prevented any immediate attempt to recover the rest of the wreck.
Conspiracy Theories Debunked
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(00:07:11)
  • Key Takeaway: Conspiracy theories suggesting full recovery are largely countered by investigative journalism and the 2010 CIA declassification, though the bell remains an anomaly.
  • Summary: Alternative histories about the sinking or full recovery lack credence based on available evidence. The CIA’s recovery of only the bow is supported by crew interviews and documentation regarding Clementine’s damage.
The Bell’s Impossibility
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(00:08:42)
  • Key Takeaway: The ship’s bell was mounted on the sail or near the control room, making its retrieval impossible if only the 38-foot bow section was recovered.
  • Summary: The bell’s location was inconsistent with the recovered debris, which included radioactive torpedo remains from the forward section. The return of the bell fueled Russian belief in a complete recovery.
Other Returned Items
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(00:10:50)
  • Key Takeaway: A year before the bell’s return, CIA Director Robert Gates returned film footage of the burial of six recovered sailors and a Soviet flag to Boris Yeltsin.
  • Summary: The recovered 38-foot section contained the bodies of six men, who were given an at-sea burial after being identified. The recovered items confirmed the presence of the forward torpedo room section.
Analyzing Retrieval Possibilities
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(00:12:13)
  • Key Takeaway: Retrieving the entire submarine or the entire front section is ruled out due to the Glomar Explorer’s cargo hold size and documented damage to Clementine.
  • Summary: The hold was too small for the 324-foot sub, and Clementine’s broken claws were visually confirmed to only allow grasping the very front end. A later attempt (Project Matador) was canceled due to leaks.
Later Retrieval Implausibility
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(00:13:59)
  • Key Takeaway: A later secret retrieval of the bell is unlikely because the Soviets monitored the wreck site, and the necessary deep-sea ROV technology did not exist until after the bell was returned.
  • Summary: The Soviets knew the wreck’s location but lacked the means to reach it until later technological advancements. DSV Alvin could not reach that depth, and the Trieste II required a large support fleet.
Polmar and White’s Explanation
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(00:15:37)
  • Key Takeaway: The authoritative book Project Azorian suggested the bell was removed from the sail and stowed in the bow compartment before the sinking, an explanation deemed too convenient.
  • Summary: Norman Polmar and Michael White offered this single explanation for the bell’s presence in the recovered section. This explanation is widely rejected because it implies the bell was moved prior to the submarine’s loss.
Russian Sailor Testimony Solution
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(00:16:21)
  • Key Takeaway: The mystery is solved by testimony from retired Soviet/Russian sailors indicating that bells were often removed before diving and stored at the boatswain’s discretion, potentially in the torpedo room.
  • Summary: Research into sailor forums showed that bell placement varied greatly, sometimes being mounted externally and removed before submerging. The boatswain was responsible for storage, meaning it could have been stowed forward for safekeeping.
Post-Bell Announcements
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(00:18:46)
  • Key Takeaway: Shortly after the bell was returned, Russia officially announced the names of the 98 personnel lost on the K-129, identifying three of the six recovered bodies.
  • Summary: The return of the bell seemed to coincide with the official acknowledgment of the submarine’s casualties after 25 years. This suggests the bell’s return was a diplomatic gesture tied to resolving lingering issues.
Skeptoid Supporter Messages
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(00:19:23)
  • Key Takeaway: Skeptoid is a listener-supported program that provides concise, rigorous analysis on skepticism topics, inspiring listeners to promote critical thinking.
  • Summary: The episode features testimonials praising the show’s informative and concise format covering diverse skeptical topics. Supporters are encouraged to join adventures or subscribe for extended content.