Donal is a 14-year old who develops a passion for greyhound racing. He works in a kennel, which is owned by Good Joe. Good Joe promises Donal ownership of Donal's favorite greyhound, The Mighty Celt, if the animal wins three races in a row. Meanwhile, Donal's mother, Kate, must adjust her life when O, a man from her past, returns. The political climate of Ireland serves as the backdrop of this story.
Unfortunately the movie The Mighty Celt is not yet available on HBO Max.
| Writing | Pearse Elliott | Writer |
| Camera | Seamus Deasy | Director of Photography |
| Editing | Dermot Diskin | Editor |
| Directing | Pearse Elliott | Director |
| Production | Brendan McCarthy | Executive Producer |
| Production | Robert Walpole | Producer |
| Production | Stephen Wright | Executive Producer |
| Production | Abi Cohen | Casting |
| Production | Michael Casey | Producer |
| Art | Tom McCullagh | Production Design |
| Production | David M. Thompson | Executive Producer |
| Costume & Make-Up | Linda Mooney | Makeup Artist |
| Art | Shane Bunting | Set Decoration |
| Sound | Brendan Geaney | Foley Artist |
| Sound | Adrian Johnston | Original Music Composer |
| Production | Shaheen Baig | Casting |
| Production | Paddy Breathnach | Producer |
| Art | Mark Lowry | Art Direction |
| Production | Tracey Scoffield | Executive Producer |
| Costume & Make-Up | Hazel Webb-Crozier | Costume Design |
| Production | Paddy McDonald | Producer |
| Costume & Make-Up | Linda Mooney | Hairstylist |
| Production | Mark Woods | Executive Producer |
| Sound | Peter Blayney | Sound Re-Recording Mixer |
