Characters played by Stephen Hawking
Self
Characters played by Eugene Babaev
(1997)
Characters played by Jeff Rawle
Narrator (1997)
Characters played by Gregory Benford
Self
Characters played by Frank Langella
Narrator
Characters played by Fred M. Niell
Fred Niell (episode 3: Cosmic Alchemy)
Characters played by Maria Papathanassiou
Self