 | Cole Hauser als Jack McAllister |
 | Lena Headey als Dr. Kathryn Jennings |
 | Morris Chestnut als Top Buchanan |
 | Eddie Cibrian als Tyler McAllister |
 | Piper Perabo als Charlie |
 | Daniel Dae Kim als Alex Kim |
 | Kieran Darcy-Smith als Strode |
 | Rick Ravanello als Briggs |
 | Marcel Iureș als Dr. Nicolai |
 | Vlad Rădescu als Dr. Bacovia |
 | Simon Kunz als Mike - Caver |
 | David Kennedy als Ian - Caver |
 | Alin Panc als Razvan - Caver |
 | Zoltan Butuc als Corvin - Caver |
 | Brian Steele als Creature Performer |
| Bruce Hunt | Director |
| Tegan West | Screenplay |
| Tom Rosenberg | Producer |
| Ross Emery | Director of Photography |
| Brian Berdan | Editor |
| Tricia Wood | Casting |
| Deborah Aquila | Casting |
| Wendy Partridge | Costume Design |
| Cristian Corvin | Art Direction |
| Enrico Fiorentini | Art Direction |
| Vlad Vieru | Art Direction |
| Malcolm Stone | Set Decoration |
| Dana Andreianu | Art Department Coordinator |
| Adam Grace | Prop Maker |
| Izabela Niculae | Construction Coordinator |
| Dan Munteanu | Sculptor |
| Liviu Marcu | Sculptor |
| Daniel Alexandru | Sculptor |
| Gary Davy | Casting |
| Tommy Lockett | Music Editor |
| Pier Luigi Basile | Production Design |
| Giancarlo J. Sini | Production Supervisor |
| Butiseaca Florin | Scenic Artist |
| Eusebiu Sirbu | Scenic Artist |
| Dane A. Davis | Supervising Sound Editor |
| Richard Adrian | Sound Effects Editor |
| Bryan O. Watkins | Sound Effects Editor |
| Bill R. Dean | Sound Effects Editor |
| Ezra Dweck | Sound Re-Recording Mixer |
| Patrick Tatopoulos | Creature Design |
| Kirsten Fazio | Visual Effects Producer |
| Glenn Morris | Visual Effects Producer |
| Ian Noe | Visual Effects Producer |
| Steven Swanson | Visual Effects Producer |
| Payam Shohadai | Visual Effects Supervisor |
| James McQuaide | Visual Effects Supervisor |
| Pimentel A. Raphael | Animation |
| Glenn Boswell | Stunt Coordinator |
| Rasvan Puiu | Stunt Coordinator |
| Leigh Mackenzie | Camera Operator |
| Calum McFarlane | Camera Operator |
| Bogdan Stanciu | Camera Operator |
| Peter Velciov | Steadicam Operator |
| Anthony S. Lenzo | Underwater Camera |
| Tony Magaletta | Additional Photography |
| Florin Niculae | Gaffer |
| Alessio Bramucci | Best Boy Electric |
| Cos Aelenei | Still Photographer |
| Leonard Bacica | Video Assist Operator |
| Andrei Cretan | Video Assist Operator |
| Mike Chiado | Digital Intermediate |
| David Reale | First Assistant Editor |
| Marian Pascale | Transportation Coordinator |
| Derek Raser | Transportation Coordinator |
| Iulian Pana | Location Manager |
| Sophie Fabbri-Jackson | Script Supervisor |
| Douglas Dresser | Location Manager |
| Angie Jones | Animation |
| Michael Steinberg | Screenplay |
| Robert Bernacchi | Co-Producer |
| James McQuaide | Co-Producer |
| Neil Bluhm | Executive Producer |
| Judd Malkin | Executive Producer |
| Marco Mehlitz | Executive Producer |
| Gary Lucchesi | Producer |
| Andrew Mason | Producer |
| Michael Ohoven | Producer |
| Richard S. Wright | Producer |
| Reinhold Heil | Original Music Composer |
| Johnny Klimek | Original Music Composer |
| Andrea Sinigaglia | Painter |
| Tony Magaletta | First Assistant Camera |
| Ian Bird | Key Grip |
| Sarbu Gigi | Grip |
| Heather Moore | Costume Supervisor |
| Gabi Cretan | Makeup Artist |
| Bruce Jurgens | CG Supervisor |
| Gary Oldroyd | Post Production Assistant |
| Giancarlo J. Sini | Production Controller |
| John Charles | Software Engineer |
| Shea Adams | Stunts |
| Claudiu Doaga | Telecine Colorist |
| Artaya Boonsoong | Technical Supervisor |
| Cristi Chitu | Transportation Captain |
| Robert Bernacchi | Unit Production Manager |
| Charles Rotherham | First Assistant Director |
| Royce Smith | Color Timer |
| Lupsa Armand | Electrician |
| Kyle Cassidy | Lighting Artist |
| Jennifer L. Smith | Casting Associate |
| Andreea Stanculeanu | Executive In Charge Of Production |
| Julia Bogdan-Rollo | Production Accountant |
| Sallie Beechinor | Production Coordinator |
| Pál Szûrös | Boom Operator |
| Jacob Riehle | Assistant Sound Editor |
| Leah Curtis | Orchestrator |
| Mac Ruth | Production Sound Mixer |
| Anuj Anand | Digital Compositors |
| Karel Beneš | Visual Effects |
| Niles Harrison | Visual Effects Coordinator |
| Constantinescu Gina | Translator |
| Dennis Johnson | Sound Recordist |
| Garry Phillips | Second Unit Director |
| Mark Larry | Supervising ADR Editor |
| Andy Malcolm | Foley Artist |
| Goro Koyama | Foley Artist |
| Carmen Stefan | Costume Assistant |
| Claudia Sarbu | Costumer |
| Anatol Reghintovschi | Assistant Director |
| Ingrid Cristea | Second Assistant Director |
| Oana Ene | Second Second Assistant Director |
| Andreea Popa | Assistant Set Dresser |
| Adrian Cancer | Storyboard Artist |
| Sabo Marian | Swing |
| Dean St. John | ADR Mixer |
| Julie Altus | ADR Recordist |
| György Mihályi | Utility Sound |
| Adrian Popescu | Special Effects Technician |
| Pedram Shohadai | VFX Artist |
| Cristina Iulia Pavalache | Stunt Double |
| Martin Fargher | Best Boy Grip |
| Cristu Ghigiu | Camera Trainee |
| Bogdan Talpeanu | Clapper Loader |
| Dalila Dulgheriu | Epk Camera Operator |
| Colin Deane | Focus Puller |
| Alexandru Durac | Second Assistant Camera |
| Cameron Gray | Animation Director |
| Pimentel A. Raphael | Lead Animator |
| Jennifer Ricchiazzi | Casting Assistant |
| Eli Calin | Wardrobe Assistant |
| Dan Mitre | Colorist |
| Christopher Reichel | Digital Intermediate Assistant |
| Siggy Ferstl | Digital Intermediate Colorist |
| Jackie Lee | Digital Intermediate Producer |
| David Heinz | Post Production Coordinator |
| Josef Brandmaier | Project Manager |
| Adam Klemens | Conductor |
| Reinhold Heil | Music Producer |
| Ioana Bernacchi | Assistant Production Coordinator |
| Javier Solsona | Creature Technical Director |
| Domnica Circiumaru | Extras Casting |
| Lucia Toderiuc | First Assistant Accountant |
| Daniel Ciobanu | Generator Operator |
| Vasile Anghel | Key Production Assistant |
| Radu Marinescu | Key Rigging Grip |
| Raul Cosma | Key Set Production Assistant |
| Daniel E. Zobrist | Matchmove Supervisor |
| Tim Matney | Matte Painter |
| Anshuman Prasad | Production Assistant |
| Iana Opran | Production Secretary |
| Monica Sandstede | Story Editor |
| Jill Heinerth | Technical Advisor |
| Ted Overton | Underwater Gaffer |
| Zeljka Stanin | Hair Supervisor |
| Paul Pattison | Makeup Supervisor |
| Gabriella Németh | Hairstylist |
| Ionut Parvu | Makeup Artist |
| Andreea Tudose | Makeup Artist |
| Thomas Floutz | Special Effects Makeup Artist |
| Clayton Martinez | Special Effects Makeup Artist |
| Miguel Ortega | 3D Modeller |
| Adrien Seffrin | Focus Puller |
| Marco Polo Constandse | Unit Manager |
