Cast & Crew zu K-Pax
| Prot/Robert Porter | Kevin Spacey | |
| Dr. Mark Powell | Jeff Bridges | |
| Claudia Villars | Alfre Woodard | |
| Rachel Powell | Mary McCormack | |
| Howie | David Patrick Kelly | |
| Ernie | Saul Williams | |
| Sal | Peter Gerety | |
| Doris Archer | Celia Weston | |
| Dr. Chakraborty | Ajay Naidu | |
| Maria | Tracy Vilar | |
| Bess | Melanee Murray | |
| Russell | John Toles-Bey | |
| Joyce Trexler | Kimberly Scott | |
| Betty McAllister | Conchata Ferrell | |
| Navarro | Vincent Laresca | |
| Simms | Mark Christopher Lawrence | |
| Dr. Steve Becker | Brian Howe | |
| Abby | Mary Mara | |
| Natalie Powell (Age 6) | Tess McCarthy | |
| Gabby Powell (Age 9) | Natasha Dorfhuber | |
| Regie |
Iain Softley |
|
| Buch |
Gene Brewer |
|
| Drehbuch |
Charles Leavitt |
|
| Kamera |
John Mathieson |
|
| Schnitt |
Craig McKay |
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| Musik |
Ed Shearmur |
|