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Appearances
How the Universe Works
Main cast, played by Dan Durda
- Episode 1x08: Moons (aka Alien Moons) (May 24, 2010)
- Episode 3x03: Jupiter: Destroyer or Savior? (Jul 23, 2014)
- Episode 3x05: Is Saturn Alive? (Aug 6, 2014)
- Episode 3x06: Weapons of Mass Extinction (Aug 13, 2014)
- Episode 5x01: Mystery of Planet 9 (Nov 29, 2016)
- Episode 5x03: Secret History of Pluto (Jan 3, 2017)
- Episode 5x05: The Universe's Deadliest (Jan 17, 2017)
- Episode 5x06: Life and Death on the Red Planet (Jan 24, 2017)
- Episode 6x02: Twin Suns: The Alien Mysteries (Jan 16, 2018)
- Episode 6x06: Secret History of Mercury (Feb 13, 2018)
- Episode 6x08: Strange Lives of Dwarf Planets (Feb 27, 2018)
- Episode 6x09: War on Asteroids (Mar 6, 2018)
- Episode 7x02: When Supernovas Strike (Jan 15, 2019)
- Episode 7x03: The Interstellar Mysteries (Jan 22, 2019)
- Episode 7x05: Secret World of Nebulas (Feb 5, 2019)
- Episode 7x09: Finding the New Earth (Mar 5, 2019)
- Episode 7x10: Cassini's Final Secrets (Mar 12, 2019)
- Episode 8x01: Asteroid Apocalypse: The New Threat (Jan 2, 2020)
- Episode 8x02: NASA's Journey to Mars (Jan 9, 2020)
- Episode 8x06: When NASA Met Jupiter (Feb 6, 2020)
- Episode 8x09: Earth's Death Orbit (Feb 27, 2020)
- Episode 9x02: Mission to a Comet (Mar 31, 2021)
- Episode 9x03: Secrets of the Sun (Apr 7, 2021)
- Episode 9x04: Aliens of the Microcosmos (Apr 14, 2021)
- Episode 9x07: The Next Supernova (May 5, 2021)
- Episode 9x11: Mystery of Alien Worlds (Jun 2, 2021)
- Episode 10x04: Dark History of Earth (Mar 27, 2022)
- Episode 10x06: Voyager's Ultimate Mission (Apr 10, 2022)
- Episode 11x01: The Moons of Saturn (Mar 5, 2023)
- Episode 11x02: A Robot's Guide to Mars (Mar 12, 2023)
- Episode 11x04: Asteroid: Countdown to Catastrophe (Mar 26, 2023)
- Episode 11x05: Solar System Special (Apr 2, 2023)
- Episode S05 Special: Most Amazing Discoveries (Nov 22, 2016)