149 iTunes Ratings (4.9 Av)


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.

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Total Listening Time: 1 day, 2 hours, 32 minutes and 46 seconds.

Selected iTunes Reviews
Great, easy listening

John has a great voice to listen to. He’s also super smart and breaks the maths and such side of things down enough my brain doesn’t freak out haha. Thanks. Sam. Perth

Great podcast for safety practitioners and risk managers.

Really enjoy John’s analysis of these famous safety incidents. Lots to learn here!

Sheldon Porcina
Love it

A wonderful podcast. Loving it!

A True Favorite

I discovered this podcast in a roundabout way investigating Chernobyl & Fukushima. John Chigdey is a passionate genius, I love his delivery, knowledge and analysis. I have never heard of many of these incidents (NOT ACCIDENTS!). It's tragic how these mistakes pile up on each other until the inevtiable happens. Everything seems so safe and reliable until it doesn't. Even if you're not an engineer or a scientist this is a must listen series. I listened to them all pretty much straight in a row. There are lessons here applicable to just about every part of life.

Sheldon Porcina
Love it

A wonderful podcast. Loving it!


Great podcast. Just finished Fukushima and it’s amazing the amount of misinformation put out by other podcasts that talk about this incident. It’s great to get an engineering perspective on what happened. Keep up the great work.

One of the most interesting podcasts

Fascinating take on the world.

Horrible incidents, but extremely compelling listening

John does a wonderful of walking through and unpicking the incidents discussed. His expertise in control systems and how they factor into unfolding events make this a must listen for anyone with an interest in engineering matters. Keep listening and pay attention.


Thank you this is such a great resource for safety professionals; well researched and easy to listen to.

Noelle L Riley
Absolutely fantastic

The disasters covered aren’t overly dramatized and are presented factually with an aspect I think many shows are missing: what was learned and what could be done differently. This is one of my new favorite podcasts

Amy True Crime Review

There is no better researched podcast than this one. Amazing telling of disasters with emphasis on engineering and science.

Best podcast i've ever listened to

I am entirely fixated on disasters, and this is by far my favorite source. Clean covering, professional with a well of barely hidden rage at the powers that be that allowed these disasters to come to fruition, and a nice voice to boot. If I could give more stars I really really would.

Rickey Smithers
One of those Exceptional Podcasts

This is one of the few podcasts where the podcaster understands what the word thorough means. No useless information is ever added. The subjects are interesting, heavy, and important. Sometimes it is dry, in the sense he is not making jokes, but that is a positive thing for this podcast but does mean it is not always the most accessible. I’m sure the podcaster knows this as he (to my glee) includes undiluted technical information to help explain the event.

Dreamy narrator

This is a great podcast for me when I need a break from true crime. He talks about cataclysmic events not simply for the morbid entertainment, but to think about the “HOW” and “WHY” factors from the perspective of an engineer. Also, the dreamy Australian voice and calming tone of the narrator is everything. It’s oddly a compliment, but when I need to fall asleep to something that won’t give me nightmares in the way many others of the same genre might— he’s my guy!

Great podcast!

As a teacher, I’ve found this podcast extremely valuable in learning great examples of why physics is important in our daily lives. He’s done a wonderful job in the recap of events and then the breakdown of where things went wrong. I highly recommend this podcast!

Please make more

I enjoy having someone with a more analytical brain talk about what went wrong and why. Too many podcasts focus on the horror of what happened in disasters, as opposed to the causes beneath it. Or they focus on being entertaining and witty. I’d much rather hear someone with a background in science go through cause and effect, and what happens when people and systems fail. For a non scientist such as myself, it’s lovely learning how someone with, I assume, education and training in engineering, perceives man made disaster Great job to everyone involved in this podcast!

interested party ny
How things go wrong

Great analysis of various disasters. Fascinating how greed has become one of the main villians in these disasters.

From a maintenance perspective amazing

I am a maintenance electrician and it is so interesting how incorrect procedures or “tribal learning” leads to dangerous outcomes

I actually get a bit excited when a new one comes out.

A podcast for those with a brain

really interesting

This podcast is awesome. Really interesting details explaining disasters from an engineering point of view.

Drew Stephens
Wonderfully in-depth explanations by an engineer

John explains the causes of disasters in great detail—many of them about incredibly interesting events that I did’t even know about.

One of the most interesting podcasts

Fascinating take on the world.

Selected Tweets

Boost-A-Gram Leaderboard (rules) for Causality
  1. 133346 sats for Episode: "45: Granville" from Crimson Deer
  2. 50017 sats for Episode: "44: Beirut Warehouse 12" from Dave Jones
  3. 50000 sats for Episode: "43: Triangle Shirtwaist Factory" from Dave Jones
  4. 20903 sats for Episode: "41: Florida International University" from Dave
  5. 20903 sats for Episode: "Royal Canberra Hospital" from Dave
  6. 20760 sats for Episode: "45: Granville" from Dave Jones
  7. 12323 sats for Episode: "43: Triangle Shirtwaist Factory" from Dave Jones
  8. 8912 sats for Episode: "42: Royal Canberra Hospital" from Dave Jones
  9. 8800 sats for Episode: "35: San Bruno" from Dave
  10. 4714 sats for Episode: "44: Beirut Warehouse 12" from Anonymous

Latest Episode

Episode 46: Mindbender

17 May, 2022

The longest, tallest, fastest indoor rollercoaster in the world was only open six months when the last carriage of a train came loose, killing three people and all that the day following an inspection that the ride was safe to operate. We look at how a design choice made maintenance more critical and then how wishing for a ride to be safe, doesn’t really help.

With John Chidgey.

Episode Gold Producers: 'r' and Steven Bridle.
Episode Silver Producers: Mitch Biegler, Kevin Koch, Shane O'Neill, Lesley Law Chan, Hafthor, Jared, Bill, Joel Maher and Katharina Will.

Episode 35: San Bruno

27 July, 2020

A modification made in 1956 to a pipeline built in the 1940s would ultimately fail costing 8 people their lives in 2010. We look at what went wrong with PG&Es gas pipeline in San Bruno, California.

With John Chidgey.

Episode Gold Producer: 'r'.
Episode Silver Producers: Mitch Biegler, John Whitlow, Joseph Antonio, Kevin Koch, Oliver Steele and Shane O'Neill.

Episode 34: Aberfan

8 May, 2020

One Friday morning in 1966 in a small town in Wales a mining spoils waste tip let go with a river of liquified rubble destroying buildings and a school. Killing 144 people, mostly children in their classrooms. The mechanics of how this happened are simple. The ignorance and economics of why this happened boggles the mind.

With John Chidgey.

Episode Gold Producer: 'r'.
Episode Silver Producers: Mitch Biegler, John Whitlow, Joseph Antonio, Kevin Koch and Oliver Steele.

Episode 33: 737 MAX

31 January, 2020

With two crashes in five months of the new 737 4th Generation a design flaw seemed likely. We look at how Boeings focus on cost-avoidance, grandfathering and bending probabilities during design would ultimately cost 346 people their lives.

With John Chidgey.
In Causality Explored, (Premium ONLY) we dive into the Xtra Aerospace calibration of the Angle Of Attack sensor and learn why written test procedures matter.

Episode Gold Producer: 'r'.
Episode Silver Producers: John Whitlow, Joseph Antonio, Kevin Koch and Shane O'Neill.

Episode 32: Walkerton

7 December, 2019

In 2000 the small township of Walkerton Ontario witnessed the largest outbreak of E.Coli infections in Canada’s history. The water utility claimed the town water was safe, but it wasn’t and many people paid with their lives.

With John Chidgey.
In Causality Explored, (Premium ONLY) we dive into what Free and Total Chlorine Residual are, why it matters, and how a 10 minute discussion with the right people could have prevented the incident at Walkerton.

Episode Gold Producer: 'r'.
Episode Silver Producers: Carsten Hansen, John Whitlow, Joseph Antonio and Kevin Koch.

Episode 31: Black Energy

4 October, 2019

The evening before Christmas Eve in 2015 saw a widespread blackout of the power grid across the Ukraine. We look at how a cyber-attack on electric utility companies in Europe, changed how cyber-security is regarded in control systems, forever.

With John Chidgey.
In Causality Explored, (Premium ONLY) we dive into GOOSE as a messaging protocol in High Voltage Circuit Breaker protection, why it's important and why it's opened a door for hackers that didn't exist 20 years ago.

Episode Gold Producer: 'r'.
Episode Silver Producers: Carsten Hansen, John Whitlow, Joseph Antonio and Kevin Koch.