Secrets of Pluto and Beyond

This episode is a mashup of S05E04 and S05E02

Black Holes Mashup

This episode is a mashup of S06E01 and S05E03

Solar System Mashup

This episode is a mashup of S06E03 and S04E04

Milky Way Mashup

This episode is a mashup of episodes S06E04 and S03E07

Journey to Frozen Worlds

This episode is a mashup of S06E05 and S05E04.

Expedition to the Hell Planets

This episode is a mashup of S06E06, "Secret History of Mercury", and S04E02, "Earth, Venus's Evil Twin".

When the Universe Kills

This episode is a mashup of S06E07, "The Quasar Enigma" and S05E06, "The Universe's Deadliest".

Secrets of Alien Worlds

This episode is a mashup of S06E08, "Strange Lives of Dwarf Planets", and S05E09, "Strangest Alien Worlds"

Asteroids: The Deadly Secrets

This episode is a mashup of "How the Universe Works", S06E09, "War on Asteroids", and "Strip the Cosmos", S01E03, "Killer Asteroids"

Doomsday in the Milky Way

This episode is a mashup of S06E04, "Death of the Milky Way", and S03E07, "Did a Black Hole Build the Milky Way?".

Pluto & Beyond: The Alien Mysteries

This episode is a mashup of S05E04, "Secret History of Pluto", and S05E02, "Mystery of Planet 9".

Secrets of the Death Stars

This episode is a mashup of S07E01, "Nightmares of Neutron Stars", and S05E05, "Stars That Kill".

Episode 2

This episode is a mashup of S07E02, "When Supernovas Strike", and S01E06, "Supernovas".

Mysteries of the Invisible

This episode is a mashup of S07E03, "The Interstellar Mysteries", and S06E10, "Mystery of Spacetime".

When Stars Die

This episode is a mashup of S07E05, "Secret World of Nebulas", and S01E04, "Stars".

Big Bang: The Dark Mysteries

This episode is a mashup of S07E06, "Did the Big Bang Really Happen?", and S03E04, "First Second of the Big Bang".

Dark Universe: The Deadly Mystery

This episode is a mashup of S07E07, "Battle of the Dark Universe", and S05E08, "The Dark Matter Enigma".

Einstein and the theory of relativity

How to Build a Planet

Some of the brightest minds and theorists on the planet explore the limits of human knowledge and explain the science behind the rules of the universe.

Moon

New scientific discoveries reveal that the moon has an incredible, violent, and dynamic history. Was the moon originally more similar to earth than previously thought?