Following a brutal series of murders taking place on Halloween, Thanksgiving, and Christmas, Gotham City's young vigilante known as the Batman sets out to pursue the mysterious serial killer alongside police officer James Gordon and district attorney Harvey Dent.
Unfortunately the movie Batman: The Long Halloween, Part One is not yet available on HBO Max.
| Production | Michael Uslan | Executive Producer |
| Production | James Krieg | Producer |
| Production | Kimberly S. Moreau | Producer |
| Production | Butch Lukic | Supervising Producer |
| Directing | Chris Palmer | Director |
| Production | Sam Register | Executive Producer |
| Writing | Bill Finger | Characters |
| Production | Wes Gleason | Casting |
| Editing | Bruce King | Editor |
| Production | Marlene Corpuz | Production Manager |
| Visual Effects | Jon Suzuki | Character Designer |
| Sound | Michael Gatt | Original Music Composer |
| Writing | Jeph Loeb | Graphic Novel |
| Writing | Tim Sale | Graphic Novel |
| Writing | Tim Sheridan | Writer |
| Art | Arthur Lee | Prop Designer |
| Visual Effects | Cathlin Hidalgo-Polvani | Character Designer |
| Visual Effects | Irineo Maramba | Character Designer |
| Art | Roger Oda | Background Designer |
| Art | Cameron Thompson | Background Designer |
| Art | David Maximo | Storyboard Artist |
| Art | Sung Shin | Storyboard Artist |
| Art | Augusto Barranco | Background Designer |
| Art | Elliot Byrne | Background Designer |
| Art | Tim Divar | Storyboard Artist |
| Visual Effects | Kim Bowen | Color Designer |
| Writing | David Mazzucchelli | Characters |
| Crew | Naya Rivera | In Memory Of |
| Art | Tec Manalac | Background Designer |
| Art | Assaf Meir | Background Designer |
| Art | George Stokes | Background Designer |
| Art | Doug Walker | Background Designer |
| Art | Adrian Barrios | Storyboard Artist |
| Art | Vinton Heuck | Storyboard Artist |
| Writing | Frank Miller | Characters |
| Production | Alicia Heraper | Assistant Production Manager |
| Visual Effects | Dou Hong | Character Designer |
| Visual Effects | Otto Schmidt | Character Designer |
| Art | Matthew Girardi | Art Direction |
| Visual Effects | Brett Hardin | Animation |
| Art | Rodel Gravo | Background Designer |
| Art | Ethan Becker | Storyboard Artist |
| Art | Jeff Wamester | Storyboard Artist |
| Visual Effects | Anthony Akira Andrade | Animation |
| Art | Rozlynn Waltz | Storyboard Artist |
| Art | Jose Andres Velasco | Storyboard Artist |
| Art | Brian Uchida | Prop Designer |
| Visual Effects | Victoria Thornberry | Color Designer |
| Sound | Mark A. Keatts | Supervising Dialogue Editor |
| Sound | Patrick J. Foley | Dialogue Editor |
| Editing | Darren Griffiths | Online Editor |
| Production | Brian E.S. Jones | Executive In Charge Of Production |
| Art | Clarke Snyder | Background Designer |
| Art | Bob Smith | Storyboard Artist |
| Sound | Kelly Ann Foley | Dialogue Editor |
| Art | Kenny McGill | Background Designer |
| Art | John Paik | Background Designer |
| Art | Albert Park | Storyboard Artist |
| Sound | David M. Cowan | ADR Editor |
| Art | Chad Townsend | Prop Designer |
| Art | Sam Montes | Storyboard Artist |
| Sound | Michael Garcia | ADR Editor |
| Art | Vince Toyama | Background Designer |
| Art | Gabo Camarillo Gil | Storyboard Artist |
| Art | Elsa Garagarza | Storyboard Artist |
| Art | Eugene Lee | Storyboard Artist |
| Visual Effects | Aric Mannion | Animation |
| Sound | Patrick J. Foley | ADR Editor |
| Sound | Michael Garcia | Dialogue Editor |
| Art | Carli Squitieri | Storyboard Artist |
| Sound | David M. Cowan | Dialogue Editor |
| Production | Peter Girardi | Executive In Charge Of Production |
| Production | Bobbie Page | Production Supervisor |
| Production | Ed Adams | Production Manager |
| Sound | Kelly Ann Foley | ADR Editor |
| Production | Angela O'Sullivan | Line Producer |
| Art | Brenna Kraus | Title Designer |
| Editing | Harrison T. Barth | Assistant Editor |
| Production | Kip Brown | Post Producer |
| Editing | Gabriel Gianola | Assistant Editor |
| Art | Adrienne Steinbaum | Graphic Designer |
| Production | Julie Osborn | Post Producer |
| Visual Effects | Sharon Yvonne Lopez | Visual Effects Production Manager |
| Art | Aren Williams | Title Designer |
| Sound | Mark A. Keatts | Supervising ADR Editor |
| Editing | Michele Beeson | Assistant Editor |
| Art | Aren Williams | Graphic Designer |
| Art | Brenna Kraus | Graphic Designer |
| Art | Adrienne Steinbaum | Title Designer |
| Writing | Bob Kane | Characters |
