Explore the lure of the Old West and how it was won—and lost—through the blood, sweat and tears of many. Spanning the four years of the Civil War, from 1861 to 1865, embark on an emotional journey across a country at war with itself, experienced through the lens of families, friends and foes all attempting to discover what it truly means to be the United States of America.
Unfortunately the movie Horizon: An American Saga - Chapter 1 is not yet available on HBO Max.
| Directing | Kevin Costner | Director |
| Production | Kevin Costner | Producer |
| Camera | J. Michael Muro | Director of Photography |
| Editing | Miklos Wright | Editor |
| Production | April Webster | Casting |
| Production | Angela Young | Casting |
| Art | Derek R. Hill | Production Design |
| Costume & Make-Up | Lisa Lovaas | Costume Design |
| Production | Danny Peykoff | Executive Producer |
| Camera | Blake Hooks | Second Assistant "A" Camera |
| Writing | Kevin Costner | Writer |
| Art | Bryan Hurley | Set Decoration |
| Art | Jarrette Moats | Art Direction |
| Art | Billy W. Ray | Supervising Art Director |
| Art | John Richardson | Art Direction |
| Art | Dawn Swiderski | Art Direction |
| Art | John B. Vertrees | Art Direction |
| Costume & Make-Up | Stacey Berrett | Hairstylist |
| Costume & Make-Up | Kimberly Carlson | Hair Department Head |
| Costume & Make-Up | Megan Gorley | Makeup Artist |
| Costume & Make-Up | Shalyse Lopez | Key Makeup Artist |
| Costume & Make-Up | Shirell Nestlerode | Makeup Artist |
| Costume & Make-Up | Tijen Osman | Key Hair Stylist |
| Costume & Make-Up | Ariel Parker | Hairstylist |
| Costume & Make-Up | Francisco X. Pérez | Makeup Artist |
| Costume & Make-Up | Molly Moonanne Sanders | Hairstylist |
| Costume & Make-Up | Anne Sellery | Makeup Artist |
| Costume & Make-Up | Brittany Troche | Hairstylist |
| Costume & Make-Up | Cheyenne Dineh Tuttle | Makeup Artist |
| Costume & Make-Up | Anya Zeitlin | Makeup Artist |
| Costume & Make-Up | Alisha Whittington | Hairstylist |
| Costume & Make-Up | Anna Williams | Key Hair Stylist |
| Production | Ayelet Bick | Production Supervisor |
| Crew | Armen Fetulagian | Post Production Supervisor |
| Production | Kipling Hicks | Production Coordinator |
| Production | Jeff T. Miller | Unit Production Manager |
| Production | Brooke Redmon | Production Supervisor |
| Production | Allie Russell | Production Secretary |
| Production | Spencer Schwartz | Production Supervisor |
| Directing | Robert Legato | Second Unit Director |
| Directing | Ryan McDowell | Additional Second Assistant Director |
| Directing | Philip A. Patterson | First Assistant Director |
| Directing | Lance Resch-Anger | Second Second Assistant Director |
| Directing | Frederic Roth | Second Assistant Director |
| Directing | Tobijah Tyler | Second Unit First Assistant Director |
| Directing | MarSchelle Walker | Second Second Assistant Director |
| Art | Reyna Barnaby | Assistant Set Decoration |
| Art | Bryan Bernardi | Set Dresser |
| Art | Julia K. Brown | Art Department Assistant |
| Art | Susan A. Burig | Graphic Designer |
| Art | John C. Cameron | Assistant Property Master |
| Costume & Make-Up | Don "Tex" Clark | On Set Dresser |
| Art | Lance Clayton | Set Dresser |
| Art | Randall Dongo-Olsen | Set Dresser |
| Art | Susan Donner | Set Dresser |
| Art | Jessica Draper | Set Dresser |
| Art | Ryan Grossheim | Assistant Art Director |
| Art | Jonathan Hallett | Storyboard Artist |
| Art | Jeffrey Paul Johnson | Property Master |
| Art | Andrew Layton | Set Designer |
| Crew | Michael Leblovic | Scenic Artist |
| Art | Daniel Licari | Props |
| Crew | Ron Licari | Armorer |
| Art | Liz Long | Set Decoration Buyer |
| Art | Matthew Mahany | Assistant Property Master |
| Art | James Malley | Set Dresser |
| Art | Jenn McLaren | Assistant Set Decoration |
| Art | Vicki M. McWilliams | Art Department Coordinator |
| Art | Jess O'Dell | Set Designer |
| Art | Mike Orme | Set Dresser |
| Art | Greg Papalia | Set Designer |
| Art | Paul Penley | Set Decoration |
| Art | Matt Pollock | Construction Foreman |
| Art | Thomas Pringle | Concept Artist |
| Art | Edmond Scott Ratliff | Set Decoration |
| Crew | Dan Riker | Armorer |
| Art | Taura C.C. Rivera | Set Designer |
| Art | Aaron Rodriguez | Standby Painter |
| Art | Bennet Silver | Leadman |
| Art | Maggie Srmayan | Assistant Art Director |
| Art | Lilly Thigpen | Assistant Production Design |
| Art | Jeremy Turley | Painter |
| Art | Miccah Underwood | Art Department Coordinator |
| Costume & Make-Up | Casey Van Maanen | On Set Dresser |
| Art | Keith Walters | Property Master |
| Costume & Make-Up | Daniela Weinreich | On Set Dresser |
| Sound | Josh Bower | Boom Operator |
| Sound | Smokey Cloud | First Assistant Sound Editor |
| Sound | Jill Cosh | Sound |
| Sound | Joe DeAngelis | Sound Re-Recording Mixer |
| Sound | Taylor Flinn | Sound Effects Editor |
| Sound | Jamie Gambell | Sound Mixer |
| Sound | Brett Grant-Grierson | Sound Mixer |
| Sound | Angelo Palazzo | Sound Designer |
| Sound | Daniel Quintana | Boom Operator |
| Sound | Albert Romero | Sound Re-Recording Mixer |
| Crew | Brady J. Condit | Special Effects |
| Crew | Kai Shelton | Special Effects Coordinator |
| Crew | Claudia Montano-Lobe | Special Effects Technician |
| Visual Effects | Alma Cebrián | Compositing Artist |
| Visual Effects | August Coleman | Digital Compositor |
| Visual Effects | Kevin Estey | Animation Supervisor |
| Visual Effects | Armen Fetulagian | Visual Effects Producer |
| Crew | Sean Kachenmeister | Visual Effects Editor |
| Crew | Andrew McCaig | Visual Effects Editor |
| Visual Effects | Rebecca j Smith | Visual Effects Producer |
| Crew | Pedro Barquin | Utility Stunts |
| Crew | Richard Bucher | Stunts |
| Crew | Duane Burkhart | Utility Stunts |
| Crew | Sergei Dmitriev | Stunts |
| Crew | Kanin Howell | Stunt Coordinator |
| Crew | Norman Howell | Stunt Coordinator |
| Crew | Jeremy Marinas | Stunts |
| Crew | Randy P Melton | Stunts |
| Crew | Shaw Momberg | Stunts |
| Crew | Wyatt Mortenson | Stunt Double |
| Crew | Walter Runningcrane Jr. | Stunts |
| Crew | Dayson Zaiah Ward | Stunts |
| Crew | Wilder Mckinly | Stunts |
| Camera | Michael Alba | Steadicam Operator |
| Camera | James W. Apted | "A" Camera Operator |
| Camera | Tim Balcomb | Digital Imaging Technician |
| Camera | A.J. Beer | Grip |
| Camera | Antonio Betulia | Key Grip |
| Camera | Ted Buerkle | Second Assistant "A" Camera |
| Crew | Jorge Devotto | Drone Operator |
| Camera | Richard Foreman Jr. | Still Photographer |
| Camera | Nana Gentry | Camera Operator |
| Camera | Bill Jacobi | Best Boy Grip |
| Camera | Alan Jacoby | "A" Camera Operator |
| Camera | Cameron A. Keidell | Second Assistant "A" Camera |
| Camera | Jeremiah Kent | Second Assistant "A" Camera |
| Camera | Eric Leach | Second Unit Director of Photography |
| Camera | Courtney Marie Miller | "B" Camera Operator |
| Camera | Noah Muro | Second Assistant "B" Camera |
| Camera | Seth Peschanksy | First Assistant "C" Camera |
| Crew | Zac Prange | Loader |
| Camera | Glade Quinn | Dolly Grip |
| Lighting | John Raymer | Gaffer |
| Camera | David 'D.R.' Rhineer | First Assistant "B" Camera |
| Camera | Stephanie Saathoff | First Assistant "B" Camera |
| Camera | Roger Spain | "A" Camera Operator |
| Camera | Austin Swenson | Second Assistant "C" Camera |
| Camera | Chris Swoboda | Aerial Camera Technician |
| Camera | Stephen Szot | Drone Pilot |
| Camera | Béla Temesváry | Aerial Director of Photography |
| Camera | Tommy Tieche | "A" Camera Operator |
| Lighting | Zach Valois | Rigging Grip |
| Lighting | Max Wenham | Best Boy Electric |
| Camera | Jaron Whitfill | Grip |
| Production | Maryellen Aviano | Extras Casting Coordinator |
| Production | Casey Bailey | Casting Assistant |
| Production | George Ludlow | Casting Associate |
| Production | Timothy Pratt | Casting Associate |
| Production | Yun | Extras Casting Coordinator |
| Costume & Make-Up | Jacob Aller | Set Costumer |
| Costume & Make-Up | Chrissy Callan | Key Costumer |
| Costume & Make-Up | Tiger Curran | Assistant Costume Designer |
| Costume & Make-Up | Jessica Ray Harrison | Costume Coordinator |
| Costume & Make-Up | Carolina Hernandez | Set Costumer |
| Costume & Make-Up | CJ Landers | Costume Assistant |
| Costume & Make-Up | Rio McBreen | Costume Assistant |
| Costume & Make-Up | David Moyer | Assistant Costume Designer |
| Costume & Make-Up | Leslie Sungail | Costume Supervisor |
| Costume & Make-Up | Ramsay Williams | Set Costumer |
| Costume & Make-Up | Steven Witkowski | Set Costumer |
| Editing | Shawyon Fazel | Digital Intermediate Producer |
| Editing | Jackie Mata | Dailies Manager |
| Editing | Mark Sawa | First Assistant Editor |
| Editing | Joseph Suzuki | Assistant Editor |
| Production | Crystal Bowden | Assistant Location Manager |
| Production | F. Nickolas Castillo | Assistant Location Manager |
| Production | Colleen Coviello | Assistant Location Manager |
| Production | Kyle T. Cox | Location Assistant |
| Production | Eric Crocombe | Assistant Location Manager |
| Production | Alyssa Dimare | Location Coordinator |
| Production | Michael Glaser | Location Manager |
| Production | Chase Hughes | Location Assistant |
| Production | Clay Maw | Assistant Location Manager |
| Art | Demian Spilsbury | Location Scout |
| Production | Clay Valenti | Assistant Location Manager |
| Production | John Whoriskey Jr. | Assistant Location Manager |
| Crew | Gustavo Borner | Score Engineer |
| Sound | Mark Graham | Orchestrator |
| Sound | Steve Mair | Musician |
| Sound | Allen Walley | Musician |
| Directing | Nirvana Adams | Script Supervisor |
| Directing | Parker Neff | Script Coordinator |
| Crew | Erik Coutts | Driver |
| Crew | Albert Menchaca | Driver |
| Crew | Steve De Leon | Transportation Coordinator |
| Production | Lisa Drabner | Production Driver |
| Crew | Sean Larsen | Transportation Captain |
| Crew | Michael Norvell | Driver |
| Crew | John VandeMerwe | Driver |
| Crew | Chresten Pope | Driver |
| Production | Gregory Bankston | Production Assistant |
| Production | Etan Barazani | Production Assistant |
| Production | Reyna Barnaby | Production Assistant |
| Crew | Kohli Calhoun | Dialect Coach |
| Production | Erin Copeland | Additional Production Assistant |
| Production | Austin Cummings | Production Assistant |
| Crew | Dana Curt | Set Medic |
| Production | Tracey Holyoak | Second Assistant Accountant |
| Crew | Carlie Merlo | Set Production Assistant |
| Production | Shane Morrisun | Production Assistant |
| Production | Alex Patho | Production Assistant |
| Production | Brandon Michael Vayda | Production Assistant |
| Writing | Jon Baird | Writer |
| Costume & Make-Up | Kelly Porter | Hairstylist |
| Production | Robert Scannell | Executive Producer |
| Production | Armyan Bernstein | Executive Producer |
| Production | Charlie Lyons | Executive Producer |
| Production | Barry M. Berg | Executive Producer |
| Production | Rod Lake | Executive Producer |
| Production | Howard Kaplan | Producer |
| Production | Mark Gillard | Producer |
| Sound | John Debney | Original Music Composer |
