As of July 2026, Cosmos Season 2 aired in 2020 with 13 episodes. Full episode guide and where to watch below.
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Cosmos Season 2

2020 13 Episodes Documentary ⭐ 8/10

If you want a documentary that respects its subject, Cosmos Season 2 is available on streaming right now. A compact run that never overstays its welcome. 1,688 viewers have already rated it on TMDB — the kind of consensus that does not happen by accident. The access the production secured is remarkable, and it does justice to it. Start it whenever you need something guaranteed to land.

Part of the current wave of titles people are actually watching, Cosmos Season 2 earns its spot. The access Cosmos Season 2 gets is remarkable — and the storytelling does full justice to it. Neil deGrasse Tyson returns as host to translate more revelations of science into a lavish transporting experience, taking audiences on a series of spiritual voyages of exploration. Previously uncharted realms are revealed, including lost worlds, worlds yet to come, and the worlds that humans may one day inhabit. Neil deGrasse Tyson and Ann Druyan lead a cast that brings real weight to the material. It was aired in 2020. The restraint in Cosmos Season 2 is what makes it trustworthy — it does not need to editorialise to make its point. The hit rate here is high enough that skipping ahead never feels like an option.

Anyone after documentary work that genuinely informs rather than confirms will value Cosmos Season 2. It does not lean on comparisons to make its case. Best experienced as a single, sustained watch if your schedule allows. The subject drives every choice here, not the other way around. The kind of production you finish and immediately want to read more about.

📡 Where to Watch Cosmos Season 2

Not currently available on major streaming platforms. Check back soon.

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🎬 Cosmos Season 2 — Episode Guide

E1
Ladder to the Stars
2020-03-09
An adventure spanning billions of years into the evolution of life and consciousness. A visit to a 100,000-year-old laboratory. The story of the change in life-style that radically altered human existence and the life of the heretic who found god in the book of nature, opening our way to the stars.
E2
The Fleeting Grace of the Habitable Zone
2020-03-09
There 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. The story of our ancestors who rose to a comparable challenge and a long-term vision of our future on other worlds.
E3
Lost City of Life
2020-03-16
A new vision of genesis at the bottom of the blood red sea of the infant Earth. And the story of the man who found the first clues to life's beginning in a green jewel. As he searched for life's origin, he risked his own, daring to toy with his Nazi tormentors.
E4
Vavilov
2020-03-16
In the first half of the 20th century pioneering geneticist Nikolai Vavilov traveled 5 continents assembling a treasury of the worlds seeds. He dreamed that science could be the means to end hunger. His refusal to tell a scientific lie cost him his life. The heroism of his colleagues and its direct ...
E5
The Cosmic Connectome
2020-03-23
A voyage of discovery through the evolution of consciousness with stops in ancient Greece, a visit to the largest life form on Earth, into the poignant dream of an abandoned orphan that opened the way to our understanding of the architecture of thought and beyond to a vision of a galactic network of...
E6
The Man of a Trillion Worlds
2020-03-23
A 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 forged in the clash of his mentors, two scientific titans. Sagan goes on realize his childhood dreams, to carry their research forward and communicate its significa...
E7
The Search for Intelligent Life on Earth
2020-03-30
A revelation of the hidden underground network that is a collaboration of four kingdoms of life, and a true first contact story between humans and beings who communicate in a symbolic language and have maintained a representative democracy for many tens of millions of years.
E8
The Sacrifice of Cassini
2020-03-30
The mysterious untold story of the scientist who figured out how to go the Moon while fighting for his life in a WWI trench. He wrote a letter to fifty years in the future. It made the Apollo Mission possible. And the saga of the twenty-year long odyssey of a robotic explorer ordered to commit suici...
E9
Magic Without Lies
2020-04-06
Meet the man who stumbled on a hole in the reality of quantum mechanics and the still-unfolding technology that made it possible.
E10
A Tale of Two Atoms
2020-04-06
How a deadly embrace between science and state altered the fate of the world, and a gripping cautionary tale of mass casualty and unlikely survival.
E11
Shadows of Forgotten Ancestors
2020-04-13
An exploration of human potential for change, concluding with the story of one of history's greatest monster and his virtuous transformation.
E12
Coming of Age In The Anthropocene
2020-04-13
A baby is born on the day the show premieres. What kind of world can she expect to grow up in? One of her possible futures is explored.
E13
Seven Wonders of The New World
2020-04-20
Take a trip to the 2039 New York World’s Fair, where the problems we now consider hopeless have been solved and thrilling possibilities exist.

🎭 Cast of Cosmos Season 2

Neil deGrasse Tyson
Neil deGrasse Tyson
Self - Host
 Ann Druyan
Ann Druyan

📋 All Seasons of Cosmos

Season 1

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