Causality

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Disasters, rebuilt minute by minute from their causes.

The gist

Causality takes apart one disaster at a time, from the West Gate Bridge collapse and the West Fertilizer Company fire to the OceanGate Titan. John Chigi narrates with an investigator's precision, quoting testimony verbatim and giving temperatures and distances in both metric and imperial units.

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About Causality

Causality takes one disaster at a time and rebuilds it from the ground up. The subjects of its episodes cross industries and continents. There is Wittenoom, a mining town in the Pilbara region of Western Australia, and the long history of asbestos behind it. There is the West Gate Bridge, where a span came down onto worksheds beneath a pillar while some workers were eating lunch in the impact zone. There are two cases involving chemicals, Bayer CropScience and the West Fertilizer Company, and two marine ones, the Carnival Triumph and the OceanGate Titan. The narrator throughout is John Chigi, and his method is steady. Episodes tend to begin with background, such as a company's founding or a town's origins, rather than with the moment of catastrophe. The failure comes later, laid out in clock times and instrument readings. In the Bayer CropScience episode, the pressure and temperature of a residue treater are read out against the clock as the pressure climbs, a high-pressure alarm sounds and the vessel's operating limit is passed. In the West Fertilizer Company episode, the explanation turns to how melted PVC pipework and organic asphalt shingles would have fallen into the FGAN pile during the fire and contaminated it. Numbers are a constant. Dust limits, distances and temperatures come in both metric and imperial, sometimes with nautical miles as well. The Wittenoom episode lays out the medical and regulatory record on asbestos across decades, from early diagnoses and exposure standards to the epidemiology that classed it as a carcinogen. Setting a local disaster against that wider record of what was known, and when, gives the episode much of its weight. People get as much attention as physics. The OceanGate Titan episode quotes David Lockridge, the company's director of marine operations, word for word, then follows him from his dismissal to his evidence to the NTSB and a whistleblower report to OSHA. The West Gate Bridge episode records the dead and injured, including three engineers who were on top of the span when it fell. The Carnival Triumph episode describes a ship without power: bedding dragged onto open decks, arguments over space, sanitation reduced to plastic bags. Chigi also makes room for candour, noting at the close of that story that he has cruised with Carnival himself and is planning another family trip with them. The Wittenoom topic came as a suggestion through the show's Facebook page, and he credits the person who sent it by name. Sources for each episode are linked in the show notes. The show carries no ads and is supported by listeners, with premium supporters receiving early releases and bonus material.

Made for: Suits a listener who wants disasters explained through engineering detail, instrument readings and documented testimony rather than suspense, and who does not mind figures read aloud in both metric and imperial.

What sets it apart: Causality leads with the record: clock times, pressures, exposure standards and verbatim testimony, with the research materials linked in the show notes. Its range also stretches well past one industry, putting asbestos mining, a bridge collapse, chemical and fertilizer sites, a cruise ship and the OceanGate Titan side by side.

In their own words

Chain of Events. Cause and Effect. We analyse what went right and what went wrong as we discover that many outcomes can be predicted, planned for and even prevented.

Why you'd press play

John Chigi brings a fault tree to the 737 MAX; your first theory may need revision.

Press play if you want

  • to follow an MCAS reset until you see why the system could activate again
  • to watch pressure readings turn a plant emergency into a minute-by-minute account
Read the full recommendation in PlayNext →
industrial and chemical accidentsstructural and construction failuresmaritime incidentsasbestos and occupational diseaseAustralian industrial historysafety regulation and investigationsengineering failure timelines

Talks about

Best episodes of Causality

Short reviews from the PlayNext desk, based on the episodes we processed.

WittenoomMar 7, 2026

Wittenoom follows a blue asbestos company town into a long medical reckoning.

Wittenoom traces the life of a company town built in 1947 around a blue asbestos mine in Western Australia's Pilbara region, then watches it contract after the mine closed in 1966.

OceanGate TitanFeb 2, 2026

A measured account of OceanGate's engineering choices and the warnings that gathered around Titan.

OceanGate Titan follows a chain of decisions, from OceanGate's 2009 founding by Stockton Rush and Guillermo Solin to the purchase of Antipodes, a 1973 submersible pressure-tested to 380 meters.

West Gate BridgeNov 29, 2025

A precise, sober account of the Westgate Bridge collapse and the risks that built toward it.

Causality treats the Westgate Bridge collapse in Melbourne as more than a single terrible failure, tracing how risk gathered around a construction project before the span gave way.

Carnival TriumphAug 26, 2025

A cruise ship fire becomes a clear, unsettling study of cascading failure, improvised survival, and one badly judged onboard decision.

Carnival Triumph treats a cruise ship fire as a lesson in cascading failure. Once power, lighting, air conditioning, and waste systems are compromised, the ship drifts 200 kilometers and the controlled world onboard starts to unravel.

Bayer CropScienceApr 30, 2025

A controlled, exacting account of an industrial emergency shaped by pressure, heat, and split-second response.

A residue treater at a large multi-tenant industrial facility beside the Kanawha River, west of Charleston, West Virginia, moves from steady pressure to disaster with grim speed.

West Fertilizer CompanyMar 31, 2025

A fertilizer storage operation becomes a precise lesson in fire, contamination, pressure, and detonation.

West Fertilizer Company uses a local storage and supply operation to show how an ordinary fire can cross into industrial catastrophe. The episode lays out the company’s place in West, Texas, the 1961 storage building, and the risks around fertilizer-grade ammonium nitrate before…

Stardust NightclubJan 7, 2025

A clear-eyed account of how blocked exits, inspections, and responsibility shaped the consequences of a nightclub fire.

Causality treats the Stardust Nightclub fire in Artan, Dublin County, as a chain of ordinary decisions that turned lethal once escape mattered.

Podcasts like Causality

Episodes

  1. 1

    Wittenoom

    Hidden gem

    Wittenoom was built in 1947 in Western Australia's Pilbara region, peaked at almost 900 residents in 1961, and mined blue asbestos for CSR.

    Mar 7, 2026·31m·2 clips
  2. 2

    OceanGate Titan

    Causality's "OceanGate Titan" traces OceanGate's carbon-fiber submersible project from a 2009 purchase to the June 18, 2023 implosion near the Titanic.

    Feb 2, 2026·39m·2 clips
  3. 3

    West Gate Bridge

    Causality traces the Westgate Bridge collapse in Melbourne, Australia, from the 1888 tunnel proposal to the 1970 failure that killed 35 people and injured 18.

    Nov 29, 2025·39m·2 clips
  4. 4

    Carnival Triumph

    Hidden gem

    Causality's "Carnival Triumph" traces the 2013 engine-room fire that left Carnival Triumph adrift and later renamed Carnival Sunrise.

    Aug 26, 2025·25m·1 clip
  5. 5

    Bayer CropScience

    Hidden gem

    At Bayer CropScience's Institute, West Virginia site, a methamyl residue treater exceeded its 50 psi MAOP on August 28, 2008 and exploded at 10:33 p.m.

    Apr 30, 2025·50m·3 clips
  6. 6

    West Fertilizer Company

    Hidden gem

    Causality examines the April 17, 2013, West Fertilizer Company explosion in West, Texas, where 15 people died and more than 260 were injured.

    Mar 31, 2025·31m·2 clips
  7. 7

    Stardust Nightclub

    Hidden gem

    Causality examines the 1981 Stardust Nightclub fire in Artane, Dublin County, where 48 people died and 214 were injured.

    Jan 7, 2025·28m·2 clips
  8. 8

    BP Husky Toledo

    Hidden gem

    Causality host John Chigi examines the 19 September 2022 BP Toledo refinery fire, which followed a guided-radar transmitter reading of 69% while water was already overflowing into the naphtha stream.

    Dec 17, 2024·40m·2 clips
  9. 9

    CrowdStrike

    Hidden gem

    Causality host John Chidjie examines CrowdStrike’s July 19, 2024 Falcon channel-file failure, which sent Windows machines into blue screens and boot loops and contributed to more than 5,000 cancelled flights.

    Oct 19, 2024·29m·2 clips
  10. 10

    Midland Resource Recovery

    Causality examines two 2017 explosions at Midland Resource Recovery in Philippi, West Virginia, where odorizer tanks were treated with sodium hypochlorite without testing their contents.

    Jun 25, 2024·28m·2 clips
  11. 11

    Callide C Blackout

    Hidden gem

    Causality examines the 25 May 2021 Callide C blackout, beginning with the plant’s two 424-megawatt supercritical units and its 220V DC protection systems.

    Mar 30, 2024·51m·3 clips
  12. 12

    Colonial Pipeline

    Hidden gem

    John Chidjie examines the May 7, 2021 ransomware attack that forced Colonial Pipeline to shut down its 5,500-mile fuel network.

    Dec 9, 2023·26m·1 clip
  13. 13

    I35 West

    Hidden gem

    Causality host John Chidji analyzes the 2007 I-35W bridge collapse in Minneapolis, where 111 vehicles were present and the structure fell in six seconds.

    Aug 27, 2023·36m·2 clips
  14. 14

    737 MAX Ethiopian Air

    Hidden gem

    Causality examines Ethiopian Air Flight 302, which departed Addis Ababa for Nairobi on 10 March 2019 with 149 passengers, five cabin crew, two flight-deck crew, and an air marshal.

    Apr 22, 2023·52m·3 clips
  15. 15

    Carmel Fireworks Explosion

    Hidden gem

    Causality examines the 6 March 2002 explosions at Cardile Fireworks in Carmel, Western Australia, where fireworks stored across four magazines had a licensed capacity of 11,800 kilograms.

    Jan 18, 2023·29m·2 clips
  16. 16

    Instituto Goiano de Radioterapia

    Hidden gem

    Causality examines the 1987 Goiânia radiation accident, when two scavengers removed a cesium-137 capsule from Instituto Goiano de Radioterapia.

    Nov 18, 2022·33m·2 clips
  17. 17

    Hyatt Regency Kansas City

    Causality examines the 17 July 1981 Hyatt Regency Kansas City atrium collapse, which killed 114 people and injured 216.

    Jul 15, 2022·42m·2 clips
  18. 18

    Mindbender

    Hidden gem

    Causality’s “Mindbender” examines the June 14, 1986 failure of the Mindbender roller coaster at West Edmonton Mall in Edmonton, Alberta.

    May 16, 2022·29m·2 clips
  19. 19

    Granville

    Hidden gem

    Causality host John Chigi reconstructs the 18 January 1977 Granville train disaster, when train 107 derailed at approximately 78 kilometres per hour and struck the Bold Street overpass.

    Apr 2, 2022·26m·1 clip
  20. 20

    Beirut Warehouse 12

    Causality examines the 4 August 2020 Beirut Warehouse 12 explosion, a blast estimated at 1.1 kilotons that shattered windows up to 10 kilometres away.

    Feb 10, 2022·32m·2 clips
  21. 21

    Triangle Shirtwaist Factory

    Causality examines the 25 March 1911 Triangle Shirtwaist Factory fire at New York's Ash Building, where 146 people died after fire spread through the eighth and ninth floors.

    Nov 9, 2021·27m·1 clip
  22. 22

    Royal Canberra Hospital

    Hidden gem

    Causality examines the 1997 implosive demolition of Royal Canberra Hospital on Canberra's Acton Peninsula, where debris injured nine people and killed 12-year-old Katie Bender nearly 500 metres away.

    Sep 16, 2021·45m·3 clips
  23. 23

    Florida International University

    Hidden gem

    Causality examines the Florida International University pedestrian bridge, a 174-foot structure that collapsed onto eight vehicles in approximately two seconds on 15 March 2018.

    Jul 8, 2021·43m·3 clips
  24. 24

    Ocean Ranger

    Hidden gem

    Causality host John Chigi reconstructs the February 1982 loss of the Ocean Ranger, a 121-metre semi-submersible drilling platform operating at Well J-34 in Newfoundland’s Hibernia oil field.

    May 24, 2021·47m·3 clips
  25. 25

    Therac-25

    Causality host John Chidjie examines six Therac-25 radiation overdoses recorded between 1985 and 1987 across 11 machines.

    Mar 23, 2021·53m·3 clips
  26. 26

    Thunder River Rapids

    Causality examines the 25 October 2016 Thunder River Rapids disaster at Dreamworld in Coomera, Queensland, where four people died after a pump trip lowered the landing-area water level.

    Jan 24, 2021·37m·3 clips
  27. 27

    Variola Birmingham

    Hidden gem

    Causality examines Janet Parker’s 1978 smallpox infection at Birmingham Medical School, where Professor Henry Bedsen led a WHO-associated variola laboratory.

    Nov 26, 2020·35m·2 clips
  28. 28

    Big Dig

    Hidden gem

    Causality examines the 2006 D Street portal ceiling collapse within Boston's $14.6 billion Big Dig project.

    Sep 15, 2020·32m·2 clips
  29. 29

    San Bruno

    Hidden gem

    Causality host John Chidjie reconstructs the 9 September 2010 San Bruno pipeline explosion, beginning with a UPS changeover at PG&E’s Milpitas Terminal.

    Jul 26, 2020·50m·3 clips
  30. 30

    Aberfan

    Hidden gem

    Causality examines the 21 October 1966 Aberfan disaster, when Tip 7 above a Welsh village liquefied after heavy rainfall and moved down the hillside.

    May 7, 2020·35m·2 clips
  31. 31

    737 MAX

    Hidden gem

    Causality's “737 MAX” traces Boeing's four 737 generations, from the 737-100's April 1968 service entry to the 737 MAX 8's 22 May 2017 entry.

    Jan 30, 2020·1h 6m·4 clips
  32. 32

    Walkerton

    Hidden gem

    Causality examines how contaminated runoff entered Walkerton’s Well 5 after 134 millimetres of rain fell over five days in May 2000.

    Dec 6, 2019·34m·2 clips
  33. 33

    Black Energy

    Hidden gem

    Causality host John Chidjie examines the December 23, 2015 cyberattack that blacked out 225,000 Ukrainian residences and shed approximately 170 megawatts of load.

    Oct 3, 2019·26m·1 clip
  34. 34

    Tim Maia

    Jul 4, 2019·19m
  35. 35

    Flight 1549

    Causality's “Flight 1549” reconstructs the 15 January 2009 U.S.

    Jun 4, 2019·23m·1 clip
  36. 36

    Hotel New World

    On 15 March 1986, Singapore's Hotel New World collapsed in less than 60 seconds after cracking, falling debris, and a low-frequency rumble, killing 33 people.

    May 9, 2019·25m·1 clip
  37. 37

    Gare De Lyon

    Hidden gem

    Causality's “Gare De Lyon” reconstructs the 27 June 1988 collision in which commuter train 153944 entered Gare de Lyon after its driver had inadvertently disabled seven of eight airbrakes.

    Apr 4, 2019·28m·1 clip
  38. 38

    Bhopal

    Hidden gem

    Causality’s “Bhopal” reconstructs the December 1984 release of methyl isocyanate from Union Carbide India Limited’s pesticide plant in Bhopal, India.

    Feb 7, 2019·36m·2 clips
  39. 39

    Deepwater Horizon

    Causality examines the April 20, 2010 Deepwater Horizon explosion after a $560 million rig's negative pressure tests produced a 1,400 PSI reading and a conflicting zero reading.

    Jan 8, 2019·47m·3 clips
  40. 40

    Columbia

    Hidden gem

    Causality examines the 2003 Columbia disaster, beginning with a 1.7-pound foam fragment that struck the left wing 81.7 seconds after launch at about 545 miles per hour.

    Dec 13, 2018·27m·1 clip
  41. 41

    Kipton

    Aug 31, 2018·19m
  42. 42

    Chernobyl

    Causality host John Chidjie reconstructs the 25–26 April 1986 Chernobyl Reactor 4 accident, from a cooling test delayed by a Kiev grid request to the later explosion.

    Jul 8, 2018·47m·3 clips
  43. 43

    Milford Haven

    Hidden gem

    Causality examines the 24 July 1994 explosion at the Pembroke Refinery in Milford Haven, where lightning-related equipment trips destabilized the Pembroke Cracking Company process area.

    Apr 29, 2018·32m·2 clips
  44. 44

    Stava Dam

    Feb 24, 2018·22m
  45. 45

    Smiler

    Nov 22, 2017·20m
  46. 46

    The Fog

    This episode describes the Great Smog of London in 1952, its causes, and its immediate onset.

    Sep 14, 2017·20m
  47. 47

    Three Mile Island

    Causality examines how Three Mile Island Unit 2 suffered a partial meltdown on 28 March 1979 after secondary cooling flow stopped, a relief valve remained open, and operators stopped primary coolant pumps.

    Jun 2, 2017·33m·2 clips
  48. 48

    Tenerife

    Hidden gem

    Causality examines the 27 March 1977 collision between Pan Am flight 1736 and KLM flight 4805 at Tenerife's Los Rodeos Airport.

    Mar 10, 2017·29m·2 clips
  49. 49

    Sampoong Department Store

    Hidden gem

    Causality examines the 29 June 1995 collapse of Sampoong Department Store in Seoul, South Korea, after a day of widening cracks, vibrations, and rejected evacuation advice.

    Jan 27, 2017·28m·1 clip
  50. 50

    Concorde

    Causality examines Concorde, the British-French supersonic airliner that cruised at Mach 2.04, consumed 26,000 litres of fuel per hour, and expanded 200 millimetres in flight.

    Dec 22, 2016·25m·1 clip