Movies like Once You Know (2021)
The best movies like Once You Know (2021) are Come See Me in the Good Light (2025), Earth: One Amazing Day (2017) and A Toxic Love Story (2026). If Once You Know hooked you with its documentary, these 30 similar films are what to watch next, and every pick says why it matches.
Quick picks
- Highest ratedBefore the Flood (2016)7.7/10 from 841 votes
- NewestA Toxic Love Story (2026)Released 2026
- In FrenchSisters in Arms (2022)Also in French
Come See Me in the Good Light (2025)
In an intimate and joyful story of love in the face of loss, celebrated poets Andrea Gibson and Megan Falley find strength—and unexpected hilarity—in what might be their final year together.
Why it matches: Recommended by TMDB viewers · both documentary
Worth the HypeMovies like thisEarth: One Amazing Day (2017)
An astonishing journey revealing the awesome power of the natural world. Over the course of one single day, we track the sun from the highest mountains to the remotest islands to exotic jungles.
Why it matches: Recommended by TMDB viewers · both documentary
Worth the HypeMovies like thisA Toxic Love Story (2026)
A string of threatening emails escalates into a revenge plot involving a newly married US marshal and his ex-girlfriend.
Why it matches: Recommended by TMDB viewers · both documentary
Popcorn FlickMovies like thisAvatar: The Deep Dive - A Special Edition of 20/20 (2022)
An inside look at one of the most anticipated movie sequels ever with James Cameron and cast.
Why it matches: Recommended by TMDB viewers · both documentary
Worth the HypeMovies like this28 Up (1985)
Just two years away from turning 30, participants in Michael Apted's documentary series are facing serious questions of identity and purpose, wondering whether they've found their place in the world.
Why it matches: Recommended by TMDB viewers · both documentary
Worth the HypeMovies like thisNo Half Measures: Creating the Final Season of Breaking Bad (2013)
A documentary about the making of season five of the acclaimed AMC series Breaking Bad.
Why it matches: Recommended by TMDB viewers · both documentary
Absolute CinemaMovies like thisHarmontown (2014)
A comedic, brutally honest documentary following self-destructive TV writer Dan Harmon as he takes his live podcast on a national tour.
Why it matches: Recommended by TMDB viewers · both documentary
Popcorn FlickMovies like thisMy Mom Jayne (2025)
Through deeply personal interviews with her siblings and an examination of the photographs, letters, and belongings left behind, Mariska assembles a new portrait of her mother Jayne Mansfield, an extraordinary and complex woman.
Why it matches: Recommended by TMDB viewers · both documentary
Absolute CinemaMovies like thisThe Age of Stupid (2009)
Pete Postlethwaite stars as a man living alone in the devastated future world of 2055, looking at old footage from 2008 and asking: why didn’t we stop climate change when we had the chance?
Why it matches: Recommended by TMDB viewers · both documentary
Popcorn FlickMovies like thisThe Crystal Calls - Making The Dark Crystal: Age of Resistance (2019)
Go behind the scenes with stars, puppeteers and creators as they bring Jim Henson's magical world of Thra back to life in a sweeping fantasy series.
Why it matches: Recommended by TMDB viewers · both documentary
Worth the HypeMovies like thisGilbert (2017)
The life and career of one of comedy's most inimitable modern voices, Mr. Gilbert Gottfried.
Why it matches: Recommended by TMDB viewers · both documentary
Popcorn FlickMovies like thisNaqoyqatsi (2002)
A visual montage portrait of our contemporary world dominated by globalized technology and violence.
Why it matches: Recommended by TMDB viewers · both documentary
Popcorn FlickMovies like thisAn Inconvenient Sequel: Truth to Power (2017)
A decade after An Inconvenient Truth brought climate change into the heart of popular culture comes the riveting and rousing follow-up that shows just how close we are to a real energy revolution. Vice President Al Gore continues his tireless fight, traveling around the world training an army of climate champions and influencing international climate policy. Cameras follow him behind the scenes—in moments private and public, funny and poignant—as he pursues the empowering notion that while the stakes have never been higher, the perils of climate change can be overcome with human ingenuity and passion.
Why it matches: Recommended by TMDB viewers · both documentary
Popcorn FlickMovies like this180° South (2010)
The film follows adventurer Jeff Johnson as he retraces the epic 1968 journey of his heroes Yvon Chouinard and Doug Tompkins to Patagonia.
Why it matches: Recommended by TMDB viewers · both documentary
Worth the HypeMovies like thisGet Me Roger Stone (2017)
From his days of testifying at the Watergate hearings to advising recent presidential candidate Donald Trump, Roger Stone has long offended people on both sides of the political fence as a force in conservative America. Outspoken author, pundit, ahead of his time election strategist, this is his story.
Why it matches: Recommended by TMDB viewers · both documentary
Worth the HypeMovies like thisBeing James Bond (2021)
Daniel Craig candidly reflects on his 15 year adventure as James Bond. Including never-before-seen archival footage from Casino Royale to the upcoming 25th film No Time To Die, Craig shares his personal memories in conversation with 007 producers, Michael G Wilson and Barbara Broccoli.
Why it matches: Recommended by TMDB viewers · both documentary
Worth the HypeMovies like thisDrew: The Man Behind the Poster (2013)
A documentary on legendary movie-poster artist Drew Struzan.
Why it matches: Recommended by TMDB viewers · both documentary
Worth the HypeMovies like thisBefore the Flood (2016)
A look at how climate change affects our environment and what society can do to prevent the demise of endangered species, ecosystems, and native communities across the planet.
Why it matches: Recommended by TMDB viewers · both documentary
Worth the HypeMovies like thisAn Inconvenient Truth (2006)
A documentary on Al Gore's campaign to make the issue of global warming a recognized problem worldwide.
Why it matches: Recommended by TMDB viewers · both documentary
Popcorn FlickMovies like thisSidney (2022)
This revealing documentary honors the legendary Sidney Poitier—iconic actor, filmmaker, and civil rights activist. Featuring interviews with Denzel Washington, Spike Lee, Halle Berry, and more.
Why it matches: Recommended by TMDB viewers · both documentary
Popcorn FlickMovies like thisSisters in Arms (2022)
In the wake of Greta Thunberg, the youth has been fighting for several months to save our planet. Leading the marches, on the front pages of the media as well as on social networks, young women have become, sometimes unintentionally, the key figures of this movement. Who are these women? Why are they so cheered and criticized at the same time? To better understanding of the commitment of Anuna and Adelaide (Belgium), Luisa (Germany), Lena (France), Leah (Uganda) and Artemisia (Brazil), we decided to follow them, but also to compare their struggle with that of another extraordinary woman who preceded them: Julia Butterfly. Twenty years ago, after spending 738 days on top of a majestic sequoia, this young American activist managed to save a thousand-year-old forest from being cut down. The film tells the story of the journey of these committed young women, each in their own way, but all driven by a unique energy, these "sisters in arms" tell their doubts and their desire.
Why it matches: Similar story and style · both documentary
Our Ark (2021)
OUR ARK is an essay film on our efforts to create a virtual replica of the real world.
Why it matches: Similar story and style · both documentary
Violence dans les Champs (2026)
Why it matches: Similar story and style · both documentary
Antarctica in a Warming World (2026)
This documentary exposes Antarctica's dramatic climate shifts, from melting ice to rising seas, showing how changes at the world's edge threaten Earth's shared future.
Why it matches: Similar story and style · both documentary
The Here Now Project (2024)
An international diary of the impact of climate change is constructed from thousands of hours of in-the-moment footage. Through the process, we witness the deep human resilience, resourcefulness and courage necessary to confront the world’s most pressing challenge.
Why it matches: Similar story and style · both documentary
Trouble in Paradise: Okhotsk Confronts Climate Change (2026)
Climate change in the Sea of Okhotsk threatens the rich ecosystem of Shiretoko Peninsula. Decreases in sea ice and spawning fish have upset the natural balance and put once common brown bears at risk.
Why it matches: Similar story and style · both documentary
Mass Extinction: Life at the Brink (2014)
It's death on an unimaginable scale, when a majority of Earth's species quickly die out. It's called "mass extinction," and it's happened at least five times before. Cataclysms, such as supervolcanoes or asteroids, are thought to cause these events, but some experts believe a manmade mass extinction could be next. Is our planet in trouble? And if so, is there anything we can do to stop the next catastrophic annihilation? Experts are traveling the world, performing groundbreaking scientific detective work to answer these very questions.
Why it matches: Similar story and style · both documentary
Dounreay: The Atomic Dream (2006)
Documentary telling the story of the rise and fall of a daring experiment into atomic energy as the history of the Dounreay fast reactor is charted by the pioneers involved.
Why it matches: Similar story and style · both documentary
Ankarista ankarin (2024)
Finnish nature documentary by Petteri Saario explores the extreme, harsh lives of creatures on outer sea islets. Film documents grey seals and sea eagles through all seasons, showing the impact of storms and climate change on their breeding grounds.
Why it matches: Similar story and style · both documentary
Back from the Brink: Saved from Extinction (2019)
The remarkable true story of three animal species rescued from the brink of extinction: California’s enchanting Channel Island Fox, China’s fabled Golden Monkey, and the wondrous migrating crabs of Christmas Island. Discover successful, heartfelt, and ingenious human efforts to rescue endangered species around the world.
Why it matches: Similar story and style · both documentary
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Frequently asked questions
What are the best movies like Once You Know?
The closest matches to Once You Know are Come See Me in the Good Light (2025), Earth: One Amazing Day (2017) and A Toxic Love Story (2026). Below are 27 more, each with the reason it matches.
What should I watch after Once You Know?
Start with Come See Me in the Good Light (2025), the closest match to Once You Know.
What is the highest-rated movie like Once You Know?
Before the Flood (2016), rated 7.7/10 by 841 TMDB users.
What is the newest movie like Once You Know?
A Toxic Love Story (2026) is the most recent release on this list.
Are there French movies like Once You Know?
Yes: Sisters in Arms (2022) and Violence dans les Champs (2026).
How are movies similar to Once You Know chosen?
First come films that Trakt’s viewers watch alongside Once You Know, then TMDB’s recommendations and films it rates as similar in story and genre. Each pick says which signal put it there.