Bruce Lester-Johnson

Self - Narrator

Mark McCaughrean

Self - ESA Senior Advisor for Science and Exploration, Self - European Space Agency (ESA), Self - Astronomer ESA

Jacqueline Mitton

Self - Astronomer

Richard Ellis

Self - Astronomer

Scott Hubbard

Self - Former Director, NASA Ames, Self - Physicist, Former Director, NASA Ames

John C. Mather

Self - JWST Senior Programme Scientist, Self - Physicist

Douglas Vakoch

Self - Space Psychologist

Sara Seager

Self - Astrophysicist, MIT

Luca Parmitano

Self - ESA Astronaut

Jamie Bock

Self - Physicist, Self - BICEP & ESA Planck

Paul Geithner

Self - JWST Deputy Project Manager

James L. Splawn

Self - NASA Marshall Space Flight Center

Gary Lyles

Self - Former Chief Engineer, SLS

Wernher von Braun

Self - NASA, 1960 - 1972

Mike Menzel

Self - JWST Mission Systems Engineer