 | Richard Coyle als Garda Ciarán O'Shea |
 | Ruth Bradley als Garda Lisa Nolan |
 | Russell Tovey als Dr. Adam Smith |
 | Bronagh Gallagher als Una Maher |
 | David Pearse als Brian Maher |
 | Lalor Roddy als Paddy Barrett |
 | Clelia Murphy als Irene Murphy |
 | Louis Dempsey als Tadhg Murphy |
| Micheál O'Gruagain als Father Potts |
 | Ned Dennehy als Declan Cooney |
| Roz McCutcheon als Hilda |
 | Stuart Graham als Skipper |
 | Michael Hough als First Mate Roy |
 | Jonathan Ryan als Sergeant Kenefick |
 | Pascal Scott als Dr. Jim Gleeson |
| Nick Chopping als Daly |
 | Barbara Adair als Mamie |
| Billy Clarke als Fisherman |
 | Laurence Doherty als Islander (uncredited) |
| Jon Wright | Director |
| Matt Platts-Mills | Editor |
| Eduardo Levy | Producer |
| Kate Myers | Producer |
| Trevor Forrest | Director of Photography |
| Kevin Lehane | Writer |
| Piers Tempest | Producer |
| Christian Henson | Original Music Composer |
| Tracy Brimm | Producer |
| Martina Niland | Producer |
| Alberto Lara | Animation |
| Julia Jones | Unit Publicist |
| Dan Johnson | Dialogue Editor |
| Dan Johnson | Sound Re-Recording Mixer |
| Sav Akyüz | Visual Effects Editor |
| Shanaullah Umerji | Visual Effects Producer |
| Nick Chopping | Stunt Coordinator |
| Hazel Webb-Crozier | Costume Design |
| Andrea Bamford | Script Supervisor |
| Tom McCullagh | Production Design |
| Shane Bunting | Set Decoration |
| Jason Swanscott | Foley |
| Gordon Wycherley | Location Manager |
| Paddy Eason | Visual Effects Supervisor |
| Roger Tooley | Steadicam Operator |
| Gavin Jones | Sculptor |
| David Bryan | Animation |
| Peter Panton | Animation |
| Gilbert James | Visual Effects Producer |
| Clare Mahoney | Foley |
| Martin Chamney | CG Supervisor |
| Gillian Devenney | Assistant Art Director |
| Jonathan Hession | Still Photographer |
| Victor Jenkins | Casting |
| Sonia Dolan | Makeup Artist |
| Edwin Ryan | Sculptor |
| Matt James | Digital Intermediate |
| Brendan Rankin | Art Direction |
| Jason Martin | Gaffer |
| Kelly Valentine Hendry | Casting |
| Lorraine Brennan | Hairstylist |
| Lionel Strutt | ADR & Dubbing |
| Paul Catling | Creature Design |
| Marc Lawes | Sound Effects Editor |
| Keith Durham | Steadicam Operator |
| Chris Roufs | Script Supervisor |
| Jeremy Price | Sound Designer |
| John Kay | Lead Animator |
| James Martin | Producer |
| John Landis | Thanks |
| Helen Steinway Bailey | Stunts |
| Kim McGarrity | Stunts |
| Cyril Megret | Executive Producer |
| Alan Maher | Executive Producer |
| Joe MacCarthy | Executive Producer |
| Chris Hunt | Executive Producer |
| Samantha Horley | Executive Producer |
| Jo Homewood | Line Producer |
| Michael Henry | Executive Producer |
| Nic Hatch | Executive Producer |
| Mark Foligno | Executive Producer |
| David Collins | Executive Producer |
| Andrew Boswell | Executive Producer |
| Robert Bevan | Executive Producer |
| Steve Wheeler | Property Master |
| Daniel Birch | Sound Recordist |
| Tolga Kenan | Stunts |
| Marc Mailley | Stunts |
