Aside from a few horrific moments in a mortuary and the sick guinea pig experiment, director Edward Bernds sadly stresses plot gimmicks at the expense of an involving story.

Violence is similarly more frequent and graphic, but it's the anticipated and appropriately ghastly climactic reveal - all too familiar in design yet tremendously satisfying - that proves to be a genuine crowd-pleaser.

The first two-thirds are superior to the final stretch.

Disappointing sequel to the classic horror film, "The Fly."