Cosmos

1. S01E01The Shores of the Cosmic OceanSeptember 28, 1980 6.7At the beginning of this cosmic journey across space and time, Dr. Carl Sagan takes us to the edge of the universe aboard a spaceship of the
2. S01E02One Voice in the Cosmic FugueOctober 5, 1980 7.1Dr. Sagan's cosmic calendar makes the history of the universe understandable and frames the origin of the Earth and the evolution of life. W
3. S01E03Harmony of the WorldsOctober 12, 1980 7.5This episode is a historical re-creation of the life of Johannes Kepler, the last scientific astrologer, the first modern astronomer and the
4. S01E04Season's bestHeaven and HellOctober 19, 1980 7.6A descent through the hellish atmosphere of Venus to explore its broiling surface serves as a warning to our world about the possible conseq
5. S01E05Blues for a Red PlanetOctober 26, 1980 7.2Is there life on Mars? Dr. Sagan takes viewers on a tour of the red planet first through the eyes of science fiction authors and then throug
6. S01E06Travelers' TalesNovember 2, 1980 7.1Dr. Sagan compares the exhilaration of 17th-century Dutch explorers who ventured in sailing ships halfway around our planet in their quest f
7. S01E07The Backbone of NightNovember 9, 1980 7.1Humans once thought the stars were campfires in the sky and the Milky Way "the backbone of night." In this fascinating segment, Dr. Sagan ta
8. S01E08Journeys in Space and TimeNovember 16, 1980 6.8A voyage to see how star patterns change over millions of years is followed by a journey to the planets of other stars, and a look at the po
9. S01E09The Lives of the StarsNovember 23, 1980 7.1Using computer animation and amazing astronomical art, Dr. Sagan shows how stars are born, live, die, and sometimes collapse to form neutron
10. S01E10The Edge of ForeverNovember 30, 1980 6.8Dr. Sagan leads us on some awesome trips — to a time when galaxies were beginning to form, to India to explore the infinite cycles of Hindu
11. S01E11The Persistence of MemoryDecember 7, 1980 6.9The brain is the focus of this fascinating portion of our journey as Dr. Sagan examines another of the intelligent creatures with whom we sh
12. S01E12Encyclopedia GalacticaDecember 14, 1980 7.0Are there alien intelligences? How could we communicate with them? What about UFOs? The answers to these questions take us to Egypt to decod
13. S01E13Who Speaks for Earth?December 21, 1980 7.2Through the use of special effects, we retrace the 15-billion-year journey from the big bang to the present. We also hear the tragic story o

Season 1 ranked & reviewed

1. S02E01Standing Up in the Milky WayMarch 9, 2014 8.9The Ship of the Imagination, unfettered by ordinary limits on speed and size, drawn by the music of cosmic harmonies, can take us anywhere i
2. S02E02Some of the Things That Molecules DoMarch 16, 2014 8.7Life is transformation. Artificial selection turned the wolf into the shepherd and all the other canine breeds we love today. And over the e
3. S02E03When Knowledge Conquered FearMarch 23, 2014 8.6There was a time, not so long ago, when natural events could only be understood as gestures of divine displeasure. We will witness the momen
4. S02E04A Sky Full of GhostsMarch 30, 2014 8.8An exploration of how light, time, and gravity combine to distort our perceptions of the universe. We eavesdrop on a series of walks along a
5. S02E05Hiding in the LightApril 6, 2014 8.8The keys to the cosmos have been lying around for us to find all along. Light, itself, holds so many of them, but we never realized they wer
6. S02E06Deeper, Deeper, Deeper StillApril 13, 2014 8.6Science casts its Cloak of Visibility over everything, including Neil, himself, to see him as a man composed of his constituent atoms. The S
7. S02E07The Clean RoomApril 20, 2014 8.8The little known but heroic story of a guy from Iowa that can't really be told without going all the way back to the time long before the Ea
8. S02E08Sisters of the SunApril 27, 2014 8.8The constellation of the Pleiades provides a vehicle for us to explore a series of paradoxes and epochal discoveries for humanity. The untol
9. S02E09Season's bestThe Lost Worlds of Planet EarthMay 4, 2014 9.0The past is another planet - many, actually - and we will bring several of them back to life and ride the Ship of the Imagination to a visio
10. S02E10The Electric BoyMay 11, 2014 8.8Our world of high technology and instantaneous electronic communication with each other and with our robotic emissaries at the solar system'
11. S02E11The ImmortalsMay 18, 2014 8.9Life itself sends its own messages across billions of years. It is written within us, in our DNA. But will we survive the damage caused by o
12. S02E12The World Set FreeJune 1, 2014 8.9Our journey begins with a trip to another world and time, an idyllic beach during the last perfect day on the planet Venus, right before a r
13. S02E13Unafraid of the DarkJune 8, 2014 9.0We know less now about the universe than educated Europeans did before the discovery of the Americas. All those billions of galaxies, all th

Season 2 ranked & reviewed

1. S03E01Ladders to the StarsMarch 9, 2020 8.6Viewers are invited on an adventure spanning billions of years into the evolution of life and consciousness. Visit a 100,000-year-old labora
2. S03E02Season's bestThe Fleeting Grace of the Habitable ZoneMarch 9, 2020 8.8There is no refuge from change in the cosmos. There will come a time in the life of the sun when Earth will no longer be a home for us. Expl
3. S03E03Lost City of LifeMarch 16, 2020 8.8Discover a new vision of genesis at the bottom of the blood-red sea of the infant Earth and the story of Victor Goldschmidt, the man who fou
4. S03E04VavilovMarch 16, 2020 7.8In the first half of the 20th century, pioneering geneticist Nikolai Vavilov traveled five continents to assemble a treasury of the world's
5. S03E05The Cosmic ConnectomeMarch 23, 2020 8.1Embark on a voyage of discovery through the evolution of consciousness with stops in ancient Greece and a visit to the largest life form on
6. S03E06The Man of a Trillion WorldsMarch 23, 2020 8.6A child lies on the rug of a tenement, dreaming of interstellar adventures. At the dawn of the space age, a young Carl Sagan's career is for
7. S03E07The Search for Intelligent Life on EarthMarch 30, 2020 8.5A hidden underground network — a collaboration of four kingdoms of life — is revealed. Explore a true first-contact story between humans and
8. S03E08The Sacrifice of CassiniMarch 30, 2020 7.4A mysterious untold story is brought to life: a scientist figures out how to go to the Moon while fighting for his life in a World War I tre
9. S03E09Magic Without LiesApril 6, 2020 8.4In the counterintuitive realm of quantum mechanics, light can be two contradictory things (a wave and a particle), and somehow — no one know
10. S03E10A Tale of Two AtomsApril 6, 2020 8.5Two atoms (carbon and uranium) from different parts of the universe meet on a small planet. Examine how a deadly embrace between science and
11. S03E11Shadows of Forgotten AncestorsApril 13, 2020 8.4From the birth of the devil in ancient Persia, where a beloved family dog becomes a seething beast, to a searing story of saintliness among
12. S03E12Coming of Age in the AnthropoceneApril 13, 2020 8.4In what kind of world can a child born in 2020 expect to grow up? When did our slide into planetwide environmental destruction begin? Enter
13. S03E13Seven Wonders of the New WorldApril 20, 2020 8.4Young Carl Sagan and Neil deGrasse Tyson first discovered their passion for science at the New York World's Fairs of the past. Visit the daz

Season 3 ranked & reviewed