Shows Like 21 Days
If you enjoyed 21 Days, will enjoy these picks that questions the purpose and weight of our choices while grounding the story in targets the intellect with complex, multi-layered ideas. Carefully balances character depth with narrative flow makes this a solid addition to your watchlist.
Standard feature-length experiences.
Best for fans of who appreciate concise storytelling.
★ Top Picks

History 101
Infographics and archival footage deliver bite-size history lessons on scientific breakthroughs, social movements and world-changing discoveries.

Beyond Belief: Fact or Fiction
Can you tell the difference between fact and fiction? Several stories of strange, mysterious and incredible occurrences are chronicled during each episode. It is up to the viewer to decide which stories actually happened and which were completely fabricated by the show’s writers. The answer is revealed by Jonathan Frakes at the conclusion of each episode.

Frontline
Since it began in 1983, Frontline has been airing public-affairs documentaries that explore a wide scope of the complex human experience. Frontline's goal is to extend the impact of the documentary beyond its initial broadcast by serving as a catalyst for change.

The New York Times Presents
A series of standalone documentaries powered by the unparalleled journalism and insight of The New York Times, bringing viewers close to the essential stories of our time.

WWE 24
The acclaimed docu-series takes you on a lightning-fast journey through a day in the life of WWE's most intriguing Superstars and groundbreaking events.

The Men Who Built America
Influential builders, dreamers and believers whose feats transformed the United States, a nation decaying from the inside after the Civil War, into the greatest economic and technological superpower the world had ever seen. The Men Who Built America is the story of a nation at the crossroads and of the people who catapulted it to prosperity.

30 for 30
30 for 30 is the title for a series of documentary films airing on ESPN, its sister networks, and online highlighting interesting people and events in sports history. This currently includes four "volumes" of 30 episodes each, a 13-episode series under the ESPN Films Presents title in 2011–2012, and a series of 30 for 30 Shorts shown through the ESPN.com website. The series has also expanded to include Soccer Stories, which aired in advance of the 2014 FIFA World Cup, and audio podcasts. This entry refers to the main Volumes of the series presented by ESPN

The Innocence Files
The personal stories behind eight cases of wrongful conviction that the Innocence Project and organizations within the Innocence Network have worked to highlight and overturn.
More Shows Like 21 Days

JANET JACKSON.
The documentary takes viewers through Janet Jackson's life and career, contain never-before-seen footage, and feature home videos from the legendary artist. Jackson discusses her controversial 2004 Super Bowl halftime show performance with Justin Timberlake, her father Joe Jackson, the death of her brother Michael Jackson, and more.

The Civil War
A documentary on the American Civil War narrated by Ken Burns, covering the secession of the Confederacy to the assassination of Abraham Lincoln.

Biography
Biography is a documentary television series. It was originally a half-hour filmed series produced for CBS by David Wolper from 1961 to 1964 and hosted by Mike Wallace. The A&E Network later re-ran it and has produced new episodes since 1987. The older version featured historical figures such as Helen Keller and Mark Twain, or long-dead entertainment figures such as Will Rogers or John Barrymore. The A&E series has placed the emphasis on such people as Marilyn Monroe, Elvis Presley, Plácido Domingo, Freddie Mercury, Jacqueline Kennedy Onassis, Eric Clapton, Pope John Paul II, Gene Tierney, Selena, Diego Rivera, Mao Zedong and Queen Elizabeth II, and fictional characters like The Phantom, Superman, Hamlet, Betty Boop, and Santa Claus. The program ended up profiling enough figures that in 1999, A&E spun it off into an entire network, The Biography Channel.

Earth at Night in Colour
Filmed across six continents, this docuseries uses cutting-edge camera technology to capture animals' nocturnal lives, revealing new behaviours filmed in full color like never before.

Haunted
Real people sit down with friends and family to share terrifying true stories from their past, re-created through chilling re-enactments.

How To with John Wilson
In a uniquely hilarious odyssey of self-discovery and cultural observation, documentary filmmaker and self-described "anxious New Yorker" John Wilson covertly and obsessively films the lives of his fellow New Yorkers while attempting to give everyday advice on relatable topics. The awkward contradictions of modern life are eased by Wilson’s candid, unpolished commentary. Building upon Wilson’s previously released "how to" short films, each episode takes wildly unexpected turns but is grounded in John's refreshing honesty.

Disney Gallery / Star Wars: The Mandalorian
Executive producer Jon Favreau invites the cast and crew of The Mandalorian to share an unprecedented look at the making of the series. Each chapter explores a different facet of the first live-action Star Wars television show through interviews, never-before-seen footage, and roundtable conversations hosted by Favreau himself.

Natural World
Natural World is a nature documentary television series broadcast annually on BBC Two and regarded by the BBC as its flagship natural history brand. It is currently the longest-running series in its genre on British television, with more than 400 episodes broadcast since its inception in 1983. Natural World is produced by the BBC Natural History Unit in Bristol, but individual programmes can be in-house productions, collaborative productions with other broadcasters or films made and distributed by independent production companies and purchased by the BBC. Natural World programmes are often broadcast as PBS Nature episodes in the USA. Since 2008, most Natural World programmes have been shot and broadcast in high definition.

E! True Hollywood Story
E! True Hollywood Story is an American documentary series on E! that deals with famous Hollywood celebrities, movies, TV shows and also well-known public figures. Among the topics covered on the program include salacious re-tellings of Hollywood secrets, show-biz scandals, celebrity murders and mysteries, porn-star biographies, and "where-are-they-now?" investigations of former child stars. It frequently features in-depth interviews, actual courtroom footage, and dramatic reenactments. When aired on the E! network, episodes will be updated to reflect the current life or status of the subject.

NOVA
PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and technology, and highlights the people involved in scientific pursuits.

Welcome to Wrexham
Documentary series tracking the dreams and worries of Wrexham, a working-class town in North Wales, UK, as two Hollywood stars (Rob McElhenney and Ryan Reynolds) take ownership of the town’s historic yet struggling football club.

Formula 1: Drive to Survive
Drivers, managers and team owners live life in the fast lane — both on and off the track — during each cutthroat season of Formula 1 racing.
Why These Shows Are Similar
These recommendations share core qualities with 21 Days (2009): Documentary themes, similar pacing, and comparable production quality. NoBadPicks uses TMDB collaborative filtering, genre matching, and AI analysis to surface series most likely to resonate with fans of 21 Days.
See full details for 21 Days (2009)



