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Matthew Lillard as Col. Steven Isaac |
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Paul Reubens as The Alien |
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Jane Lynch as Irene Maloof |
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Jack Hallett as Dr. Duxler |
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Kelly Hu as Dr. Annabelle Fermi |
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Ravi Kapoor as Dr. Marc Allen |
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Bruce McGill as Gen. Keller |
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Brandon Molale as Armed Soldier |
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Mona Sishodia as Scientest 3 |
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Kelvin Yu as Private Simms |
| Sound | Steve Hampton | Original Music Composer |
| Production | Todd Sharp | Executive In Charge Of Production |
| Art | Michael Ruby | Sign Painter |
| Production | Dean Parisot | Executive Producer |
| Costume & Make-Up | Kimberly Felix | Makeup Department Head |
| Costume & Make-Up | Carol A. O'Connell | Hair Department Head |
| Costume & Make-Up | Andy Clement | Special Effects Key Makeup Artist |
| Sound | Jack Levy | Supervising Sound Editor |
| Visual Effects | Doug Drexler | Visual Effects Supervisor |
| Sound | John Adair | Original Music Composer |
| Sound | David Hadder | Boom Operator |
| Editing | Robert K. Lambert | Editor |
| Directing | Lynne Martin | Second Second Assistant Director |
| Art | Brian Feola | Construction Foreman |
| Sound | Richard 'Rick' Partlow | Foley Artist |
| Production | Mike Armstrong | Executive Producer |
| Art | Mike Medina | Construction Foreman |
| Crew | David J. Barker | Special Effects Technician |
| Crew | Michael Del Genio | Special Effects Technician |
| Visual Effects | Ronald Zarro | Special Effects Supervisor |
| Camera | Henry Cline | Camera Operator |
| Crew | Joel Larson | Driver |
| Writing | Mike Armstrong | Writer |
| Art | Doug Kraner | Production Design |
| Art | Joe Monaco | Set Dresser |
| Sound | Doug Madick | Foley Artist |
| Production | Jane Bartelme | Producer |
| Costume & Make-Up | Joe Monaco | On Set Dresser |
| Production | Tucker Maloney | Production Assistant |
| Crew | Nina Harlan | Compositor |
| Crew | Ian Eyre | Stunt Double |
| Crew | Buddy Sosthand | Stunts |
| Production | Jenny Fumarolo | Production Coordinator |
| Production | David Latt | Executive Producer |
| Production | Chad Savage | Co-Producer |
| Visual Effects | Michael Gibson | Visual Effects Producer |
| Crew | Alex Daniels | Stunt Coordinator |
| Costume & Make-Up | Jamelle Flowers | Set Costumer |
| Sound | Mary Parker | Music Editor |
| Crew | Norb Phillips | Stunts |
| Sound | Andy Paley | Original Music Composer |
| Sound | Jillinda Palmer | Music Editor |
| Production | Sarah Quale | Assistant Production Coordinator |
| Production | Geralyn Flood | Casting Associate |
| Sound | Brad Hamilton | Music Editor |
| Crew | Michael Li | Stunts |
| Crew | Jeff Verdick | Transportation Captain |
| Production | Katja Blichfeld | Casting Coordinator |
| Lighting | Scott C. Keys | Rigging Grip |
| Lighting | Jeff Murrell | Chief Lighting Technician |
| Visual Effects | Heather McAuliff | Digital Compositor |
| Editing | Lara Khachooni | Assistant Editor |
| Sound | Brad Hamilton | Music Producer |
| Visual Effects | Jack Marshall | Visual Effects Coordinator |
| Lighting | Ronald R. Koch Jr. | Electrician |
| Lighting | Steve Reinhardt | Assistant Chief Lighting Technician |
| Directing | Kerry Lyn McKissick | Script Supervisor |
| Lighting | Frank Dorowsky | Rigging Gaffer |
| Crew | Jonathan A. Rosenfeld | Transportation Coordinator |
| Directing | Dean Parisot | Director |
