While working in a greenhouse, a man receives an insect bite after touching an exotic plant. Immediately, he falls ill and is taken to an emergency room where the doctors diagnose him as suffering from an unknown bacteria, and a strange parasite which emerges from his mouth as a large slimy wormlike creature. Soon, there are more cases of bacterial infection, but the more immediate problem for the hospital is the wormlike creature which after accidental exposure to a genetic growth stimulant grows to monstrous proportions and starts a reign of terror and bloodshed in the hospitals abandoned wing.
Steve Railsback
Gwynyth Walsh
John Vernon
Joe Flaherty
Robin Duke
Susan Anspach
Don Lake
Helen Hughes
Sandy Webster
Joy Coghill
Ivan E. Roth
Bill Lake
Peter Van Wart
Don Ritchie
Stuart Stone
Marsha Moreau
Nathan Adamson
Sarah Polley
Cynthia Belliveau
Philip Akin
Laura Dickson
Jane Dingle
Dan Lett
Michael J. Reynolds
Michael Caruana
Gina Wilkinson
David Clement
Ursula Balzer
Les Rubie