Astrobiologist - How the Universe Works

How the Universe Works

Guest cast, played by Chris McKay

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 3x08: Our Voyage to the Stars (aka Starman) (Aug 27, 2014)
Episode 3x09: The Search for a Second Earth (Sep 3, 2014)
Episode 5x06: Life and Death on the Red Planet (Jan 24, 2017)
Episode 7x08: Hunt for Alien Life (Feb 26, 2019)
Episode 7x10: Cassini's Final Secrets (Mar 12, 2019)

Guest cast, played by Caleb Scharf

Guest cast, played by Lewis Dartnell

Episode 7x08: Hunt for Alien Life (Feb 26, 2019)
Episode 8x02: NASA's Journey to Mars (Jan 9, 2020)
Episode 8x03: Hunt for Alien Evidence (Jan 16, 2020)
Episode 8x09: Earth's Death Orbit (Feb 27, 2020)
Episode 9x02: Mission to a Comet (Mar 31, 2021)
Episode 9x04: Aliens of the Microcosmos (Apr 14, 2021)
Episode 10x02: Curse of the Cosmic Rays (Mar 13, 2022)
Episode 10x04: Dark History of Earth (Mar 27, 2022)
Episode 11x01: The Moons of Saturn (Mar 5, 2023)
Episode 11x02: A Robot's Guide to Mars (Mar 12, 2023)
Episode 11x05: Solar System Special (Apr 2, 2023)

Guest cast, played by Kathryn Bywaters