Name	Known for
David Ackroyd Self - Narrator Self - Narrator See fewer	The Dark Secret of Harvest Home (1978)
Forrest J. Ackerman Self Self See fewer	Dead Alive (1992)
Arthur C. Clarke Self (archive footage) Self (archive footage) See fewer	2001: A Space Odyssey (1968)
Harlan Ellison Self Self See fewer	The Twilight Zone (1985)
Hugo Gernsback Self (archive footage) Self (archive footage) See fewer
Michael Hecht Self Self See fewer	Nova (1974)
Warren James Self Self See fewer	History's Mysteries (1998)
Fritz Lang Self (archive footage) Self (archive footage) See fewer	Contempt (1963)
Willy Ley Self (archive footage) Self (archive footage) See fewer	Conquest of Space (1955)
Ron Miller Self Self See fewer	James Cameron's Story of Science Fiction (2018)
Kim Mohan Self Self See fewer	History's Mysteries (1998)
Larry Niven Self Self See fewer	Inconstant Moon
Hermann Oberth Self (archive footage) Self (archive footage) See fewer	Woman in the Moon (1929)
George Slusser Self (as George A. Slusser) Self (as George A. Slusser) See fewer	Prophets of Science Fiction (2011)
Gregory Stock Self Self See fewer	Technocalyps (2006)
Jules Verne Self (archive footage) Self (archive footage) See fewer	20,000 Leagues Under the Sea (1954)
H.G. Wells Self (archive footage) Self (archive footage) See fewer	The War of the Worlds (1953)
Judy Busey Re-enactor (voice) Re-enactor (voice) See fewer	American Pie Presents: Band Camp (2005)
Patrick Connelly Re-enactor (voice) Re-enactor (voice) See fewer	Ancient Aliens (2009)
Patrick John Downey Re-enactor (voice) Re-enactor (voice) See fewer	History's Mysteries (1998)
Sam Jones Re-enactor (voice) Re-enactor (voice) See fewer	UFO Files (2004)
Mario Laliberte Re-enactor (voice) Re-enactor (voice) See fewer	Mama's Will (2010)
Jason Smith Re-enactor (voice) Re-enactor (voice) See fewer	Hard Evidence (1995)