Where to watch How the Universe Works Season 5
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Availability checked 28 October 2026. Streaming availability data from JustWatch.
How the Universe Works Season 5 episodes
S05 E02
Mystery of Planet 9
42 mins · Tue, 29 Nov 2016
Scientists have discovered a mysterious ninth planet ten times the size of Earth on the very edge of the solar system. This strange world could have moons with extraterrestrial life.
S05 E03
Black Holes: The Secret Origin
42 mins · Tue, 6 Dec 2016
Scientists search for evidence that could help explain how supermassive black holes grow so big. Neither dark matter nor cannibalism can fully explain these beasts, but the new science may finally provide an answer.
S05 E04
Secret History of Pluto
41 mins · Tue, 3 Jan 2017
The first close-up images of Pluto reveal unimaginable secrets. Scientists investigate if Pluto is home to a warm ocean of liquid water beneath its surface and whether this underground ocean could harbour life.
S05 E05
Stars That Kill
41 mins · Tue, 10 Jan 2017
Explores the real-life Death Stars in the cosmos, which could snuff out Earth without much effort, and the science behind the destructive power of six of the deadliest stars.
S05 E06
The Universe's Deadliest
42 mins · Tue, 17 Jan 2017
The universe is a dangerous place, and an exploration of the deadliest spots in the cosmos reveals that between Earth and the edge of the universe, there are a million ways to die. A crash test dummy is on a mission to discover the worst of them.
S05 E07
Life & Death on the Red Planet
42 mins · Tue, 24 Jan 2017
Scientists explore the evolution of life on Mars before a series of cataclysmic events transformed the planet from a watery world to a hostile one. They believe life will find a way to continue despite the setbacks.
S05 E08
The Dark Matter Enigma
42 mins · Fri, 27 Jan 2017
Dark matter is one of the greatest mysteries of the universe facing scientists today. Exploring whether it could be the cause of supermassive black holes and mass extinctions.
S05 E09
Strangest Alien Worlds
42 mins · Tue, 7 Feb 2017
Discoveries of new planets have revealed countless worlds much stranger than Earth. Some of these strange worlds don't have stars and others are made out of diamonds.