Cosmos S1, E4

Astronomer Carl Sagan leads us on an engaging guided tour of the various elements and cosmological theories of the universe.

Cast:Carl Sagan , Jaromír Hanzlík , Jonathan Fahn , Bob Hevelone , Jean Charney , Arthur 'Lonne' Lane , Ronald A. Hilbert , Alan Belod , Larry Soderblom , Victor C. John , Linda Morabito , Cecilia White , Bill Grant , Dana Hlavácová , Josef Vinklár