Frailty gets off to an awkward start thanks to excessive narration that tells us what we can see, but once debuting director Bill Paxton gets the confidence to use it more sparingly, his disturbing tale of a family of serial killers/demon slayers becomes much more impressive. What keeps it from descending into pure schlock is that the conflict derives from the fact that this family loves each other and the elder son's dilemma is his powerlessness at stopping his father in his God-given task. What raises it way beyond the family-that-slays-together-stays-together norm is a series of daring last-act plot twists that for once actually turn the film into something much more provoking and morally disturbing. Even the dubiousness of the set-up - would an experienced senior FBI man really accompany the grown-up boy to the scene of the crimes alone? - suddenly makes sense. Strong performances by Matt O'Leary and Matthew McConnaughey (no, seriously, he's very good for once) and a good score by Brian Tyler, one of the few interesting new composers working today, add to the quality.
Sadly, Paramount's R2 DVD comes up very short on the extras, especially compared to the R1 DVD. But it's still worth picking up for the film itself - you won't forget it in a hurry.