Jack
Beech
Julia
Victoria
Sykes
Sally
Kara
Julia's Child
Grow Hall Survivor (as David Madison)
NASA Ground Control (uncredited)
Survivor (uncredited)
Tourist (uncredited)
Jack's Daughter (uncredited)
Librarian (uncredited)
Grant Halliburton - Tech / Survivor (uncredited)
Tech (uncredited)
Radio Operator (uncredited)
College Student (uncredited)
Alien (uncredited)
NASA Booster Engineer (uncredited)
NASA Controller (uncredited)
Core survivor (uncredited)