An imaginative premise, a solid cast, and a few surprisingly fresh characterizations lift this out of the mire.

It's pretty dumb and not very scary.

An unfortunately unstimulating exercise in a stale idea with pitiful execution on a paltry budget.

If "Frogs" isn't always perfectly logical, it is unnerving, providing apt foreshadowing to its ecological, don't-mess-with-nature themes without having to turn the proceedings into a preachy message movie.