Can I join in thus fab thread. I have read both threads. Wiw, so many details I would have missed without all your analysis.
My theories are that Tony buries ian in the half built foundations of the church - you see the cement mixer and the marked out foundations covered in a tarpaulin in last week's episode (there were several scenes where you see this).
I don't think Emily is involved in Ollie's disappearance buy is scared if Tony and his violence at the time if the disappearance, hence keeps apologising. In present day, she has become harder and colder and is not moved by him and his feelings because of everything that's happened. She is playing happy families with Mark and his son as a way to 'forget' her list life.
Vincent is Ian's stepson, abused by Ian and therefore turned into a paedophile himself, which disgusts him and he has tried really hard to suppress it, hence never abusing anyone anyone directly, despite his use of child porn), and hence his voluntary chemical castration.
Yes to hotel owners having lured the child away at the bar. I though it weird in the early episodes that they seemed happy to have tony and emily stay in their hotel with the crazy media circus going on and not get upset or stressed about it. Also yesbto the towns dirty secret of a paedophile ring being covered up. Mayor is part of it, probably abusing the niece he talks about.
Can't believe Monique is Molly - child was rather boyish looking, yet grown up is all glamorous. But she is obviously going to be significant in some way.
No idea re the french policeman and what he found in the drain, or what actually happened to Ollie and at whose hands.