Hana Seung / Joon Seung (12 episodes, 2016-2018)
Javier Delgado (12 episodes, 2016-2018)
Amelie Durand (12 episodes, 2016-2018)
Robert Foucault (12 episodes, 2016-2018)
Marta Kamen (12 episodes, 2016-2018)
Oliver Lee / Oliver (10 episodes, 2016-2018)
Leslie Richardson (9 episodes, 2016-2018)
Self - Author, How We'll Live On Mars (7 episodes, 2016-2018)
Ed Grann (6 episodes, 2016)
Mike Glenn / Lt. Michael Glenn (6 episodes, 2018)
Jen Carson (6 episodes, 2018)
Shep Marster (6 episodes, 2018)
Kurt Hurrelle (6 episodes, 2018)
Ava Macon (6 episodes, 2016)
Self - CEO and Lead Designer, Space X / Self - CEO and Lead Designer, SpaceX (6 episodes, 2016-2018)
Self - Director, Hayden Planetarium (6 episodes, 2016-2018)
Sam (5 episodes, 2016)
Dr. Jay Johar (5 episodes, 2018)
Self - Former Senior Editor for the Environment, National Geographic (5 episodes, 2018)
Commander Chen / Gan Chen (5 episodes, 2018)
Self - Director of Space Policy, The Planetary Society (5 episodes, 2016-2018)
Cameron Pate (4 episodes, 2018)
Roland St. John (4 episodes, 2018)
Self - Investigative Journalist, Energy Analyst (4 episodes, 2018)
Zhenzhen Yow / Zhen Zhen Yow (4 episodes, 2018)
Brandon Mcclain (3 episodes, 2016)
Ben Sawyer (3 episodes, 2016)
DRB Solutions Senior Board Member (3 episodes, 2016)
Self - Arthur, 'Collapse' and 'Guns, Germs and Steel' (3 episodes, 2018)
Self - Arthur, 'Light of the Stars: Alien Worlds and the Fate of the Earth' (3 episodes, 2018)
Self - Author, The History of the World Series (3 episodes, 2018)
Self - Author, 'This Changes Everything: Capitalism vs. The Climate' (3 episodes, 2018)
Self - NASA Program Scientist for the Cryosphere (3 episodes, 2018)
Danny (3 episodes, 2018)
Russian Rep. Volkov / Volkov (3 episodes, 2018)
Ms. Wilson (3 episodes, 2018)
Breanna Maire Allmandinger (3 episodes, 2016)
Victoria Mcclain (3 episodes, 2016)
Anika Chandra (3 episodes, 2018)
Assistant (3 episodes, 2018)
E.U. Rep. Davies (3 episodes, 2018)
Director, Unit for Experimental Psychiatry / Self - Professor, University of Pennsylvania (3 episodes, 2016-2018)
Self - Author, 'The Martian' / Self - Arthur, 'The Martian' (3 episodes, 2016-2018)
Self - President, The Mars Society (3 episodes, 2016-2018)
Self - Division Director, NASA Planetary Science (3 episodes, 2016)
Paul Richardson (2 episodes, 2016)
Self - Creative Director, Voyager Interstellar Mission, NASA (2 episodes, 2018)
Self - Chair of Astrobiology, Library of Congress (2 episodes, 2018)
Self - Arthur, Mars Trilogy / Self - Author, Mars Trilogy (2 episodes, 2018)
Self - Author, 'Pandemic: Tracking Contagions from Cholera to Ebola and Beyond) (2 episodes, 2018)
Self - Head of Energy Unit, Greenpeace Russia (2 episodes, 2018)
Self - Former Speaker, U.S. House of Representatives (2 episodes, 2018)
Self - Arctic Activist (2 episodes, 2018)
Self - Glaciologist (2 episodes, 2018)
Self - Professor of Immunology and Infectious Disease, Harvard University (2 episodes, 2018)
CEO, The Planetary Society / Self - Science Educator (2 episodes, 2018)
Nurse (2 episodes, 2018)
Chelsea Hurelle (2 episodes, 2018)
South Korean Rep. Kim (2 episodes, 2018)
Clerk (2 episodes, 2018)
Nigerian Rep. Odogwu (2 episodes, 2018)
Abby (2 episodes, 2018)
Ben Sawyer's Father (2 episodes, 2016)
Former Astronaut / Self - Administrator, Former Astronaut, NASA / Self - Former NASA Administrator (2 episodes, 2016-2018)
Self - Co-Founder, Co-Chairman, Planetary Resources (2 episodes, 2016)
Self - Associate Administrator, NASA / Self - Astrophysicist & Former Astronaut (2 episodes, 2016)
Self - Research Scientist, NASA (2 episodes, 2016)
Self - Astrophysicist (2 episodes, 2016)
Self - Smithsonian Institution (2 episodes, 2016)
JAXA worker (2 episodes, 2016)
IMSF American Member (2 episodes, 2016)
JAXA official (2 episodes, 2016)
Young Ben Sawyer (2 episodes, 2016)
Self - Project Systems Engineer, Jet Propulsion Laboratory (2 episodes, 2016)
Young Hana and Joon (1 episode, 2016)
Cygnus Pilot (1 episode, 2016)
Flight Director Mission Control (1 episode, 2016)
Louise Varda (1 episode, 2016)
DRB Solutions Board Member (1 episode, 2016)
Joon's Assistant (1 episode, 2016)
IMSF Member USA (1 episode, 2016)
Self - President, Eurasia Group (1 episode, 2018)
Self - Research and Development Scientist, NASA (1 episode, 2018)
Self - Author, 'Physics of the Future' (1 episode, 2018)
Self - Captain, Arctic Sunrise (1 episode, 2018)
Self - Actic Activist (1 episode, 2018)
Self - Production Operations Discipline Responsible (1 episode, 2018)
Self - Former NASA Astronaut (1 episode, 2018)
Self - Former NASA Chief Scientist (1 episode, 2018)
Chris Owens (1 episode, 2018)
Self - Climate Advocate (1 episode, 2018)
American Reporter (1 episode, 2018)
Self - Foreign Minister Finland (1 episode, 2018)
Self - President, Saami Council (1 episode, 2018)
British TV Reporter (1 episode, 2018)
Self - Foreign Minister, Sweeden (1 episode, 2018)
Man (1 episode, 2018)
American TV Reporter (1 episode, 2018)
Mother (1 episode, 2018)
Anchor (1 episode, 2018)
Chinese TV Reporter (1 episode, 2018)
IMSF Crew Member (1 episode, 2018)
Argentinian TV Reporter (1 episode, 2018)
Self - Crew Architect, HI-SEAS (1 episode, 2016)
Self - Principal Investigator, HI-SEAS (1 episode, 2016)
Self - Director of Build Reliability, SpaceX (1 episode, 2016)
Self - Director, Jet Propulsion Laboratory (1 episode, 2016)
Self - Deputy Project Director, Antarctic Support Contract (1 episode, 2016)
Self - Director, White House Office of Science and Technology (1 episode, 2016)
Self - Principal Investigator, ExoMars (1 episode, 2016)
Self - Geologist, University of Texas-Austin (1 episode, 2016)
Self - Apollo 13 Commander (1 episode, 2016)
Olympos Town Resident (1 episode, 2016)
Self - Author, 'Packing for Mars' (1 episode, 2016)
IMSF Secretary General (1 episode, 2016)
Self - Chief Engineering Officer, HI-SEAS (1 episode, 2016)
Person watching launch (uncredited) (unknown episodes)
