Starring Marc Singer and Tracy Scoggins, the film is loosely based on the 1987 novel Watchers by Dean Koontz.

The clever dog prompts the Marine captain to call an animal psychologist from the top secret laboratory where the genetic manipulation occurred.

Together with this trusted psychologist (Tracy Scoggins), they attempt to elude the murderous monster and the gory trail of death closing in on them.

[4] Variety wrote "Roger Corman’s second try at adapting Dean R. Koontz’s bestseller is a marked improvement, yielding a suspenseful thriller.

What's most interesting about Watchers 2 ('most' being a relative term) is that it actually seems to follow much more closely to the Dean Koontz source material than did the original.