Name	Known for
Erik Thompson Narrator Narrator See fewer	A Murder of Crows (1998)
Jim Logan Self - Space Medicine Associates (as Dr. Jim Logan) Self - Space Medicine Associates (as Dr. Jim Logan) See fewer	Known Universe (2009)
Michio Kaku Self - Author, 'Physics of the Impossible' Self - Author, 'Physics of the Impossible' See fewer	Accidental Truth: UFO Revelations (2023)
Vanna Bonta Self - Author, 'Flight' Self - Author, 'Flight' See fewer	Beauty and the Beast (1991)
John Spencer Self - Space Architect Self - Space Architect See fewer	Woman in Motion (2019)
Allen Newcomb Self - Vanna's Husband Self - Vanna's Husband See fewer	Vanna Bonta: What Goes Up (2005)
David Garrison Self - Univ. of Houston, Clear Lake Self - Univ. of Houston, Clear Lake See fewer	The Universe (2007)
April E. Ronca Self - Space Biologist Self - Space Biologist See fewer	The Universe (2007)
Sheryl Bishop Self - Univ. of Texas, Medical Branch (as Sheryl L. Bishop) Self - Univ. of Texas, Medical Branch (as Sheryl L. Bishop) See fewer	The Visit (IV) (2015)
Harvey Wichman Self - Aerospace Ergonomicist Self - Aerospace Ergonomicist See fewer	The Universe (2007)
Samuel Coniglio Self - Space Tourism Society Self - Space Tourism Society See fewer	Vintage Tomorrows (2015)
Will Whitehorn Self - Virgin Galactic Self - Virgin Galactic See fewer	Branson (2022)
Ann Wichman Self - Harvey's Wife Self - Harvey's Wife See fewer	The Universe (2007)
Richard Branson Self - Business Magnate (archive footage) (uncredited) Self - Business Magnate (archive footage) (uncredited) See fewer	Superman Returns (2006)