- Chris Hadfield - Self - Astronaut
- Jerry Linenger - Self - Astronaut
- Guillaume Néry - Self - Performance Freediver
- Thomas Senf - Self - Mountaineer
- Aldo Kane - Self - Volcanologist
- Kenny Broad - Self - Environmental Anthropologist
- Tim Mousseau - Self - Mutational Biologist
- Caroline Ciavaldini - Self - Professional Climber
- Nichelle Nichols - Self
- Rocky Robinson - Self - Motorcyclist
- Peggy Whitson - Self - Astronaut
- Nicole Stott - Self - Astronaut
- Mae Jemison - Self - Astronaut
- Jeffrey A. Hoffman - Self - Astronaut
- Jaime Awe - Self - Archeologist
- Nat Sharman
- Matt Renner
- Darren Aronofsky
- Nic Stacey
- Susannah Price
- Jane Root
- Daniel Pemberton
- Paul Thompson
- Marco Augusto Comba
- Daniel Nolan
Nichelle Nichols interpreta a Self en la serie.
Will Smith hace el papel de Self - Host.
Capítulo disponible en las siguientes plataformas:
