Characters played by Cain Alexander
Young Samuel Langley
Characters played by Kurt Bell
Self
Characters played by Robert R. Bell
Josiah King
Characters played by Len Caric
Harvey Childs
Characters played by David Conrad
Narrator
Characters played by Tom D. Crouch
Self
Characters played by William Fickinger
Self
Characters played by George Gatewood
Self
Characters played by Art Glaser
Self
Characters played by Matthew Green
Wealthy industrialist
Characters played by Jay Keenan
John Brashear
Characters played by Daniel V. Klein
Professor Lewis Bradley
Characters played by Nick LaMantia
Assistant #1
Characters played by Henry Lenard
Dr. James Keeler
Characters played by Demetria Marsh
Julia Smith Brashear
Characters played by Jeff Monahan
Dr. Samuel Pierpont Langley
Characters played by Nancy Robinson
Self
Characters played by Tom E. Sturgeon
Charles Matthews Manly
Characters played by Eli Tokash
Young John Langley
Characters played by Neil deGrasse Tyson
Self
Characters played by Kristopher Veenis
Assistant #2