| Bruce Willis | James Cole | |
| Brad Pitt | Jeffrey Goines | |
| Madeleine Stowe | Kathryn Railly | |
| Vernon Campbell | Tiny | |
| Bob Adrian | Geologist | |
| Carol Florence | Astrophysicist |
| Joseph Melito | Young Cole | |
| Jon Seda | Jose | |
| Michael Chance | Scarface | |
| H. Michael Walls | Botanist | |
| Simon Jones | Zoologist | |
| Bill Raymond | Microbiologist |