Jim Al-Khalili

Self - Presenter

Danielle George

Self - Engineer, Self - Radiophysics Engineer

James Meigs

Self - Science Writer

Tiera Fletcher

Self - Aeronautical Engineer, Self - Rocket Engineer, Boeing

Patrick Stewart

Self - Narrator (US version)

Adolf Hitler

Self

Wernher von Braun

Self

Giorgio Matar

Self - Robotics Scientist

Alice Roberts

Self - Biological Anthropologist

Derrick Pitts

Self - Chief Astronomer, The Franklin Institute

Richard Garriott

Self - Entrepreneur and Private Astronaut

Saul David

Self - Historian

Brandon Mikesell

Self - Wingsuit Pilot

Shini Somara

Self - Fluid Dynamicist

Danny Forster

Self - Architect

Rodney Brooks

Self - Robotics Scientist

Nadya Mason

Self - Physics Professor