An accident occurs in an ultra-secret government biological weapons laboratory spreading a sinister bacteria.
| Actor | Role |
|---|---|
 Sam WaterstonCal Morse | Cal Morse |
 Kathleen QuinlanJoanie Morse | Joanie Morse |
 Yaphet KottoMajor Connolly | Major Connolly |
 Jeffrey DeMunnDr. Dan Fairchild | Dr. Dan Fairchild |
 Richard DysartDr. Nielsen | Dr. Nielsen |
 G.W. BaileyTom Schmidt | Tom Schmidt |
 Jerry HardinVic Flint | Vic Flint |
 Rick RossovichBob | Bob |
| CCynthia CarleDana | Dana |
 Scott PaulinCaptain Walston | Captain Walston |
 Kavi RazDr. Ramesh Kapoor | Dr. Ramesh Kapoor |
 Keith SzarabajkaTippett | Tippett |
 J. Patrick McNamaraConnolly's Aide | Connolly's Aide |
 Tom McFaddenDeputy Grazie | Deputy Grazie |
 Jack ThibeauPisarczyk | Pisarczyk |
 Kyle T. HeffnerVideo Technician #1 | Video Technician #1 |
 Meshach TaylorVideo Technician #2 | Video Technician #2 |
 Lori HallierTV Reporter | TV Reporter |
 Jeannie EpperWoman on Video Screen | Woman on Video Screen |
 Bernard Behrens(uncredited) | (uncredited) |