Carl Sagans Cosmos - Episode 7 - The Backbone of the Night. Carl Sagans Cosmos - Episode 6 - Traveller's Tales. Carl Sagans Cosmos - Episode 5 - Blues for a Red Planet. Carl Sagans Cosmos - Episode 4 - Heaven & Hell. Episode 2: One Voice in the Cosmic Fugue(Cosmos: A Personal Voyage, Carl Sagan) Carl Sagan's: Cosmos Part 3 - Harmony of the Worlds. Episode 1: The Shores of the Cosmic Ocean (Cosmos: A Personal Voyage, Carl Sagan)