In darkest rural Ireland, ex-boxer Douglas 'Arm' Armstrong has become the feared enforcer for the drug-dealing Devers family, whilst also trying to be a good father to his autistic five-year-old son, Jack. Torn between these two families, Arm's loyalties are truly tested when he is asked to kill for the first time.
Unfortunately the movie Calm with Horses is not yet available on HBO Max.
| Writing | Colin Barrett | Short Story |
| Production | Rory Gilmartin | Co-Producer |
| Costume & Make-Up | Emma Scott | Makeup Designer |
| Production | Gemma O'Shaughnessy | Line Producer |
| Directing | Benjamin Crowe | First Assistant Director |
| Directing | Mike Hayes | First Assistant Director |
| Directing | Conor Flannery | Third Assistant Director |
| Production | Seán Burke | Location Manager |
| Crew | Jennifer Eriksson | Post-Production Manager |
| Production | Emer O'Shea | Production Executive |
| Visual Effects | Brooke Lyndon-Stanford | Visual Effects Supervisor |
| Production | Ed Guiney | Producer |
| Production | Filiz-Theres Erel | Line Producer |
| Production | Iman Kiashemshaki | Producer |
| Sound | Benjamin John Power | Original Music Composer |
| Art | Fletcher Jarvis | Art Direction |
| Art | Sandra Szpytko | Set Decoration |
| Costume & Make-Up | Anna Bass | Hairstylist |
| Costume & Make-Up | Roisin Copeland | Assistant Hairstylist |
| Costume & Make-Up | Linda Gannon | Key Hair Stylist |
| Costume & Make-Up | Stephanie Kavanagh | Makeup Trainee |
| Costume & Make-Up | Clodagh McInerney | Prosthetic Makeup Artist |
| Production | Cecily Colahan | Production Manager |
| Crew | Tricia Perrott | Post Production Supervisor |
| Directing | Claire T. Cassidy | Assistant Director Trainee |
| Directing | David Kennedy | Second Assistant Director |
| Directing | Zoe Tough | Additional Second Assistant Director |
| Directing | Denis Fitzpatrick | Additional Second Assistant Director |
| Directing | Dani Wall | Assistant Director Trainee |
| Art | Charlotte Ball | Set Dresser |
| Art | Anthony Brannigan | Painter |
| Art | Barry Davenport | Props |
| Art | Damien Gordon | Art Department Trainee |
| Art | Jim Grindley | Property Master |
| Art | Sean Lyons | Set Dresser |
| Art | Ian McCaffrey | Storyboard Artist |
| Art | John McHale | Assistant Art Director |
| Art | Sarah McLoughlin | Standby Art Director |
| Sound | David Crane | ADR Recordist |
| Sound | David Giles | Production Sound Mixer |
| Sound | Mark Henry | ADR Recordist |
| Sound | Tapio Liukkonen | Foley Artist |
| Sound | Juan Montoto Ugarte | Production Sound Mixer |
| Sound | Matis Rei | Supervising Sound Editor |
| Sound | Adrian Sandu-Yota | ADR Mixer |
| Sound | Oscar Schlicht | Assistant Foley Artist |
| Sound | Nik Stojkov | Production Sound Mixer |
| Crew | Kevin Nolan | Special Effects Coordinator |
| Visual Effects | Dheeraj Chaudhary | Visual Effects Compositor |
| Visual Effects | Justin Cornish | Visual Effects Supervisor |
| Crew | Clwyd Edwards | Executive Visual Effects Producer |
| Visual Effects | Shane Jaeger-Collins | Visual Effects Coordinator |
| Visual Effects | Roshni Maranat | Visual Effects Producer |
| Production | Chandra Mouley Atray | Head of Production |
| Production | Swapnali Mumbarkar | Line Producer |
| Art | Oleg Loginov | Opening Title Sequence |
| Crew | Neil Chapelhow | Stunts |
| Crew | Norman Kelly | Stunt Driver |
| Crew | Branislav Martinak | Fight Choreographer |
| Crew | Branislav Martinak | Stunt Double |
| Crew | Lubomir Misak | Stunts |
| Crew | Donal O'Shea | Stunts |
| Crew | Peter Pedrero | Stunt Coordinator |
| Camera | Si Bell | Additional Director of Photography |
| Lighting | Jazz Bhalla | Gaffer |
| Camera | Rodrigo Bruzoni | First Assistant "B" Camera |
| Camera | John Connon | Key Grip |
| Lighting | John Creagh | Best Boy Electrician |
| Lighting | Addo Gallagher | Gaffer |
| Camera | Aidan Gault | "B" Camera Operator |
| Lighting | Eimear Ennis-Graham | Lighting Technician |
| Camera | Fiona Graham | Second Assistant Camera |
| Camera | Alfie Hollingsworth | Camera Trainee |
| Camera | Daniel Kelly | Assistant Camera |
| Camera | Dylan Knapp | Digital Imaging Technician |
| Lighting | Jack Madden | Electrician |
| Lighting | Howard Morton | Electrician |
| Camera | Mick O'Rourke | Steadicam Operator |
| Lighting | Leo Olesker | Electrician |
| Camera | Leighton Spence | First Assistant Camera |
| Lighting | Zik Udenze | Electrician |
| Lighting | Paul Wilcox | Electrician |
| Camera | Francesca Zucchini | Camera Trainee |
| Production | Mairéad Campbell | Extras Casting |
| Production | Michelle Giovanni | Casting Associate |
| Costume & Make-Up | Mary Fox | Costume Supervisor |
| Costume & Make-Up | Paul Keady | Costume Standby |
| Costume & Make-Up | Anya Jane Magee | Daily Wardrobe |
| Costume & Make-Up | Mathew Stevenson Wright | Assistant Costume Designer |
| Crew | Joseph Mackenzie | Post Production Assistant |
| Production | Connie McCool Duncan | Post Production Coordinator |
| Production | Sabrina Salome | Post Production Coordinator |
| Editing | Matthew Troughton | Colorist |
| Production | Damon Crane | Location Manager |
| Production | Ruben Pereira | Assistant Location Manager |
| Sound | Phil Canning | Music Supervisor |
| Directing | Áine Máire Ní Tháibhís | Script Supervisor |
| Crew | Paul Cullen | Transportation Captain |
| Production | Nicky Earnshaw | Head of Production |
| Production | Emily Leach | Production Manager |
| Production | Katherine Pomfret | Production Executive |
| Crew | Boyd Rankin | Armorer |
| Production | Gabby King | Casting Assistant |
| Directing | Nick Rowland | Director |
| Writing | Joseph Murtagh | Writer |
| Production | Daniel Emmerson | Producer |
| Production | Michael Fassbender | Executive Producer |
| Production | Kate Glover | Co-Producer |
| Production | Theo Barrowclough | Associate Producer |
| Editing | Nicolas Chaudeurge | Editor |
| Editing | Matthew Tabern | Editor |
| Production | Shaheen Baig | Casting |
| Art | Tara O'Reilly | Art Direction |
| Art | Annalisa Andriani | Set Decoration |
| Costume & Make-Up | Sharon Long | Costume Design |
| Camera | Piers McGrail | Director of Photography |
| Art | Damien Creagh | Production Design |
| Production | Conor McCaughan | Executive Producer |
| Production | Will Clarke | Executive Producer |
| Production | Mike Runagall | Executive Producer |
| Editing | Andonis Trattos | Editor |
| Costume & Make-Up | Anna Bass | Makeup Artist |
| Costume & Make-Up | Edwina Kelly | Makeup Artist |
| Sound | Matis Rei | Sound Re-Recording Mixer |
| Sound | Morgan Muse | Supervising Dialogue Editor |
