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Season guide

How the Universe Works: Season 6

10 episodes Premiered Jan 9, 2018 Updated Oct 23, 2026
Previously on How the Universe Works

Season 6 Lore Primer

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

  • ⚡ Picks up essential narrative continuity directly following the events of How the Universe Works Season 5.
  • ⚡ Character alliances, factions, and personal loyalties undergo significant shifts under escalating stakes.
  • ⚡ Addresses unresolved cliffhangers and thematic mysteries introduced during previous seasons.
  • ⚡ Establishes the primary seasonal conflict that drives serialized character arcs toward the finale.
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Season 6 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 6 Progress Shield

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Binge Efficiency Engine

Season 6: Filler vs. Essential Canon

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

40%
60%
Mytharc (4): Crucial lore & season climaxes
Core (6): Character development & subplots
Side Quest (0): Standalone / filler
S6·E1 Mytharc

Are Black Holes Real?

Jan 9, 2018 · 42 min

New discoveries are challenging everything we know about black holes, and astronomers are beginning to question if they even exist. The latest science tries to explain how they wor

S6·E2 Core

Twin Suns: The Alien Mysteries

Jan 16, 2018 · 42 min

Planets that orbit two suns instead of one might be deadly hell worlds, but new discoveries reveal that sci-fi star systems with binary stars might be optimal places for alien life

S6·E3 Core

Dark History of the Solar System

Jan 23, 2018 · 42 min

Our solar system hides a dark and violent past, and new discoveries reveal that Earth and the planets were formed from the destruction of strange alien worlds that came before us.

S6·E4 Core

Death of the Milky Way

Jan 30, 2018 · 42 min

The Milky Way is dying, and using the latest science and discoveries, experts are investigating what's killing it.

S6·E5 Mytharc

Uranus & Neptune: Rise of the Ice Giants

Feb 6, 2018 · 42 min

Uranus and Neptune are mysterious, icy worlds at the edge of our solar system, and new discoveries reveal that these strange planets might have helped start life on Earth.

S6·E6 Core

Secret History of Mercury

Feb 13, 2018 · 42 min

Mercury is a deadly world, facing attacks from the Sun, comets, and other planets, and even though it's the smallest planet in our solar system, it has a dangerous secret a dangero

S6·E7 Core

The Quasar Enigma

Feb 20, 2018 · 42 min

Quasars are the brightest and most powerful objects in our universe, and though they have shaped the cosmos, they might ultimately destroy everything that exists.

S6·E8 Core

Strange Lives of Dwarf Planets

Feb 27, 2018 · 42 min

Our solar system is home to hundreds of strange, tiny worlds called dwarf planets, and new discoveries reveal the secrets of these mysterious places.

S6·E9 Mytharc

War on Asteroids

Mar 6, 2018 · 42 min

Scientists are using cutting-edge technology to stop an asteroid apocalypse, and for the first time, mankind is closer than ever to keeping Earth safe from these killer space rocks

S6·E10 Mytharc

Mystery of Spacetime

Mar 13, 2018 · 42 min

Spacetime is the secret structure that controls our universe, and this strange four-dimensional substance controls time, light, and energy. It will also determine how our universe

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