Name	Known for
Ian Holm Self - Narrator (voice) Self - Narrator (voice) See fewer	The Lord of the Rings: The Fellowship of the Ring (2001)
Neil Armstrong Self (archive footage) Self (archive footage) See fewer	Forest 404 (I) (2019)
Mark Burchell Self - University of Kent Canterbury (as Dr Mark Burchell) Self - University of Kent Canterbury (as Dr Mark Burchell) See fewer	Horizon (I) (1964)
David Deamer Self - University of California Santa Cruz (as Prof David Deamer) Self - University of California Santa Cruz (as Prof David Deamer) See fewer	Horizon (I) (1964)
Richard Hoover Self - Astrobiology Laboratory NASA (as Prof Richard B Hoover) Self - Astrobiology Laboratory NASA (as Prof Richard B Hoover) See fewer	Naked Science (2004)
Fred Hoyle Self (archive footage) (as Sir Fred Hoyle) Self (archive footage) (as Sir Fred Hoyle) See fewer	A for Andromeda (1961)
Godfrey Louis Self - Mahatma Gandhi University (as Prof Godfrey Louis) Self - Mahatma Gandhi University (as Prof Godfrey Louis) See fewer	Horizon (I) (1964)
Richard Nixon Self (archive footage) (as President Nixon) Self (archive footage) (as President Nixon) See fewer	Frost/Nixon (2008)
John D. Rummel Self - Planetary Protection Officer NASA HQ (as John D Rummel) Self - Planetary Protection Officer NASA HQ (as John D Rummel) See fewer	Mars Rising (2007)
Bill Stone Self - Stone Aerospace (as Dr Bill Stone) Self - Stone Aerospace (as Dr Bill Stone) See fewer	Horizon (I) (1964)
Chandra Wickramasinghe Self - Cardiff University (as Prof Chandra Wickramasinghe) Self - Cardiff University (as Prof Chandra Wickramasinghe) See fewer	The Unexplained Files (2013)