Cosmos: Possible Worlds S1, E3

"Cosmos: A Spacetime Odyssey" returns for a second season. Ann Druyan, original creative collaborator to Carl Sagan, serves as executive producer.

Cast:Neil deGrasse Tyson , Seth MacFarlane , Sasha Sagan , Trang Vo , Elizardo Torrez , Shereen Balles , Viggo Mortensen , Patrick Stewart , Adam Tsekhman , Marcelo Tubert , Steve Oatway , Ernie Vigil , Masoumeh Husseini , Judd Hirsch , Mara Junot , Joseph J. Micucci , Nick Sagan , Neil Arnote