Parasite is lethargic between its terror scenes, making it a test of patience for all but the fanatical followers of horror cheapies.

Uninspired actors intone a banal script, reduced by clumsy pacing to a minimum of suspense.

This is a badly acted B movie without much flair for involving its audience.

Exists totally for its 3-D images and getting through the turgid plot in between is really quite a haul.