This isn't Grant playing some twisted variation of his usual type: Grant is providing 100% pure Grant here, no accents or fake teeth or abrasive harshness to blunt his appeal. "What if the charming Hugh Grant you all know and love invited you in and then turned out to be evil" is the premise, and it delivers on that premise.
Enter the two Mormon missionaries who are our guide into the world of Hugh Grant horror, Sister Barnes (Sophie Thatcher) and Sister Paxton (Chloe East). Barnes is the more worldly of the duo, the one who's got a bit of experience under her belt and has thought through things a bit. Paxton is the chirpy fresh-faced newcomer, someone who means well and hasn't yet had the thrill of doing good works knocked out of her - though the fact she hasn't yet actually converted anyone is a bit of a bummer.
Right from the start, this is a duo you don't mind hanging with. You may not want to sign up to their church, but they're likeable, intelligent, self-aware and committed to what they're doing without being pushy about it. They turn up on the doorstep of Mr. Reed (Grant) because they've been invited, and they only go inside after asking all the right questions - mostly about his unseen but definitely a real person wife.
Of course, once they get inside things start going wrong, but importantly a): the missionaries continue to ask the right questions and do the right thing (Paxton wants out the second things get iffy - nobody's failing to read the room here), and b): this is Hugh Grant at maximum charm they're dealing with, so even when he starts going on a little too much about religion he does so in a way that's very disarming.
Which is, of course, where the scary side of things comes from. We know he's bad news - just look at the poster! - but in the world of the movie it's perfectly reasonable to give him the benefit of the doubt. Should we panic at the first suggestion of not-quite-rightness from anyone we meet? Of course not; we'd never get any shopping done for starters. And yet there are people out there willing to exploit their charm and our desire to get along for their own ends - why look, there's one on the screen now.
Heretic is at its strongest when the threat is simply that someone as charming and likable and fun to listen to as Hugh Grant is using those powers for an evil you can't quite figure out. There's a point around the middle of the film that's possibly the highlight, where the missionaries - having been drawn deeper into Mr Reeds creepy church-like house by his promises that the only way to leave is to go further in - are given a choice of two doors to leave by.
One, we're told, is the good door, and the other is the bad. Mr Reed, as is his want, poses this choice in big terms, saying their choice will reveal the very core of their beliefs. Sister Barnes, just wanting to get the hell out, brushes off this choice, opens one of the doors, looks inside, then quietly closes it and goes to the other door, refusing to say what she's seen.
It's a chilling moment, largely because it's the point where Mr Reed's creepy preaching enters the real world. What's beyond the door - a literal gateway to Hell? Another door? The bathroom? And once we find out, it becomes a more traditional scary film, the core mystery gone.
Which is kind of the point: Mr Reed is someone in love with his own voice, his own ideas, and to him everyone else is just a prop. Sadly his ideas are, when you boil them down, bog standard internet troll blather about religion that our heroines can see right through. Seems charm alone will only get you so far.
Of course, this being a horror movie, what lies behind his charm isn't all that pleasant.
- Anthony Morris