- Brendan Fraser John Crowley
- Harrison Ford Dr. Stonehill
- Keri Russell Aileen Crowley
- Jared Harris Dr. Kent Webber
- Courtney B. Vance Marcus Temple
- Meredith Droeger Megan Crowley
- Diego Velazquez Patrick Crowley
- Sam Hall John Crowley, Jr.
- Patrick Bauchau Eric Loring
- David Clennon Dr. Renzler
- Dee Wallace Sal
- P.J. Byrne Dr. Preston