When cracks in the Earth's crust large enough to swallow a city block appear, a team of scientists must go deep into the Earth to find a way to stop the destruction.
| Actor | Role |
|---|---|
 Luke PerryDr. Jake Rollins | Dr. Jake Rollins |
 Natalie BrownJen | Jen |
 Michael DornGeneral Fielding | General Fielding |
 Rick RobertsDr. Palmer Drake | Dr. Palmer Drake |
 Marie WardDr. Karen West | Dr. Karen West |
 Mimi KuzykMarsha Crawford | Marsha Crawford |
 Michael TeigenBlack | Black |
 Mike RealbaDecker | Decker |
 Adam FrostCaptain Haywood | Captain Haywood |
 James DowningMajor McEwan | Major McEwan |
 Jefferson BrownSeth | Seth |
 Martin RoachMan in Black | Man in Black |
| JJ.C. KennyNews Reporter | News Reporter |