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Season guide

How to Die Clever: Season 4

30 episodes Premiered Jun 2, 2025 Updated Sep 27, 2026
Previously on How to Die Clever

Season 4 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ Directly follows the overarching narrative developments of How to Die Clever Season 3.
  • ⚡ Faction dynamics and core character alliances shift under escalating external stakes.
  • ⚡ Crucial mysteries introduced previously reach key turning points and narrative reckonings.
  • ⚡ Sets up serialized story arcs that build directly toward the climactic season finale.
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Season 4 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 4 Progress Shield

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Binge Efficiency Engine

Season 4: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

10%
90%
Mytharc (3): Crucial lore & season climaxes
Core (27): Character development & subplots
Side Quest (0): Standalone / filler
S4·E1 Mytharc

The Size is the Limit

Jun 2, 2025 · 4 min

Could Godzilla and King Kong, who are bigger than any dinosaur, exist in real life and destroy the world? For Professor Moustache, there is no such thing as a dumb question

S4·E2 Core

Don’t Sweat It!

Jun 3, 2025 · 4 min

Why do humans sweat so much and smell so bad, when I smell so good? For Professor Moustache, there is no such thing as a dumb question.

S4·E3 Core

Baby Boomers

Jun 4, 2025 · 4 min

What does “OK boomer” mean? And what’s a boomer anyway? At full gallop on his time pony, Professor Moustache prances into the past to look at how generations are formed and why the

S4·E4 Core

Coronaviruses

Jun 5, 2025 · 4 min

Oh Covid. We were fed up with it at the time and we’ve been confused ever since. Who was to blame again, bats or pangolins? How does a virus travel from animals to humans? Professo

S4·E5 Core

Babyface

Jun 6, 2025 · 4 min

Sometimes when you see a newborn baby, you don’t really know what to say. It doesn’t really look like its parents; it looks more like a crumpled creature. You may think you’re hear

S4·E6 Core

Anger Games

Jun 9, 2025 · 4 min

We tend to look at whether young people with violent behaviour play video games. But what does the research say? Professor Moustache delves into some pretty dodgy psychological exp

S4·E7 Core

Homo Augmentus

Jun 10, 2025 · 4 min

Captain Hook had a hook as a hand. Darth Vader had bionic limbs. Films make it look easy to replace severed limbs. But is it that easy in real life? What is scientifically possible

S4·E8 Core

Furry Insects

Jun 11, 2025 · 4 min

There are researchers who have not only counted the 3 million tiny hairs found on a moth, but who have also studied how often they clean their fur. If it were up to Nathanaël, we’d

S4·E9 Core

Skynet, the Artificial Unintelligence

Jun 12, 2025 · 4 min

If robots in the future developed a conscience, would they want to kill humankind like in “The Terminator”? Let’s imagine for a minute that it was their ultimate goal. Professor Mo

S4·E10 Core

Conscious AI

Jun 13, 2025 · 4 min

Everyone is afraid of the singularity – that stage when machines become conscious and inevitably decide to kill us all. Professor Moustache explains that, in order for that to happ

S4·E11 Core

Cry Baby Cry

Jun 16, 2025 · 4 min

Screaming babies anywhere can be unbearable. Especially on trains. Professor Moustache explains that it’s normal to sometimes want to chuck them out the window when they won’t stop

S4·E12 Core

It’s Not Me, It’s Evolution

Jun 17, 2025 · 4 min

Why did Mother Nature make babies who won’t let their parents get any sleep? Or who refuse to eat mum’s delicious mashed potatoes? In this episode, a baby goes on trial with evolut

S4·E13 Core

Of Machine and Men

Jun 18, 2025 · 4 min

Why did we feel sorry when that man kicked the cute dog robot? But then we feel nothing when we see a broken blender? Researchers have studied this bizarre human weakness; our tend

S4·E14 Core

Plants with Feelings

Jun 19, 2025 · 4 min

While mowing the lawn, do you ever think about whether grass or flowers can get hurt when they’re cut? What about whether plants talk to insects? Can Professor Moustache mow the la

S4·E15 Core

DIY Poop Survival

Jun 20, 2025 · 4 min

Various Inuit legends say that in sub-zero temperatures, it’s possible to carve a tool out of a frozen turd. Without any scatological judgment, brave archeologists decided to test

S4·E16 Core

The Superpower of Spit

Jun 23, 2025 · 4 min

Is it a good idea to use your saliva to clean things? Like a dummy that fell on the floor, or a stain on a table? How about washing Timothée Chalamet’s sandy face in Dune? Scientif

S4·E17 Core

In Your Face, Santa!

Jun 24, 2025 · 4 min

Thankfully there are researchers who ask fundamental questions. Like John Trinkaus, a US professor who wanted to find out whether children really enjoyed having their photo taken w

S4·E18 Core

Twenty Thousand Eyes Under the Sea

Jun 25, 2025 · 4 min

People are afraid of taking airplanes because they fly high and can fall around 11 kilometres. But why aren’t they just as scared on a cruise ship? The boat could also sink 11 kilo

S4·E19 Core

Space and Furious

Jun 26, 2025 · 4 min

If we’re going to live on the Moon, can we bring our good old Fiat 500 with us? Unfortunately, my friends, terrestrial cars are not cut out for lunar weather conditions. We would n

S4·E20 Core

Selfish Humans

Jun 27, 2025 · 4 min

Professor Moustache loves John Trinkaus because he tackled so many everyday mysteries with scientific research. For example, what is the percentage of people who actually respect t

S4·E21 Core

Crimes Without Gravity

Jun 30, 2025 · 4 min

Every country has its laws. But what happens when a crime isn’t committed on Earth? What if an astronaut kills a colleague on the International Space Station? And what about on the

S4·E22 Core

An Atomic Blast in Paris

Jul 1, 2025 · 4 min

What would happen if an atomic bomb were dropped on Paris? Would those outside the ring highway that surrounds the city make it? According to Professor Moustache, they would, but o

S4·E23 Core

Happy as a Tardigrade

Jul 2, 2025 · 4 min

The tardigrade, an eight-legged micro animal that looks like a teddy bear, can be found everywhere. And Professor Moustache loves them. It may be cute and microscopic, but the tard

S4·E24 Core

Mushroom Zombies

Jul 3, 2025 · 4 min

In the TV show “The Last of Us”, people become zombies after a fungus takes over their brains, which was inspired by something that happens in real life. There is a fungus that doe

S4·E25 Core

Monkey Talk

Jul 4, 2025 · 4 min

If only it were possible for our pets to speak to us and tell us how much they love us… Well, it turns out that scientists have already tried to get monkeys to speak to us using wo

S4·E26 Core

Researchers with Ants in Their Pants

Jul 7, 2025 · 4 min

Imagine you’re a tiny ant in a jungle and you find a massive cookie chunk just three metres from your anthill. You rush to grab a piece of the cookie, but how will you find your wa

S4·E27 Core

Tiny-Arms-Osaurus Rex

Jul 8, 2025 · 4 min

Even though it is a predatory killing machine in many ways, the poor T-Rex has also been a laughing stock because of the size of its arms. Scientists have long wondered why they ar

S4·E28 Core

Doggy Supernose

Jul 9, 2025 · 4 min

Professor Moustache finds it a little too easy to make fun of dogs he sees online who would do anything for a biscuit. But if humans were to develop the same sense of smell as dogs

S4·E29 Mytharc

Anatomy of a Football Fall

Jul 10, 2025 · 4 min

If there is one sport that science has studied in detail, it’s football. We thought we knew everything there was to know about football players, but then female players came along!

S4·E30 Mytharc

How Can I Grow My Own Meat?

Jul 11, 2025 · 4 min

It is possible to grow meat in a lab without killing cows, like growing a plant in a pot. Now, Nathanaël dreams of harvesting his steaks along his window sill. But turns out growin

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