Why time was up? [spoilers]
Why did Lasse decide to end Merete's life after holding her captive for 5 years? Was it because Lasse discovered the police were investigating her disappearance or, was it his plan all along?
He always intended her to die, but when the police came he knew he had to kill her then as they might discover her and rescue her.
shareI was secretly hoping we were being tricked into thinking both events were happening at the same time i.e. the police arriving at the farm and the tank being depressurised, but that it would turn out to be that she was actually already dead when the police arrived i.e. the depressurisation had actually happened some time ago. So the cops would still get their man, solve the case etc but not manage to save the woman. I think that would have been a more realistic turn of events given the gritty realistic tone that the film seemed to be aiming for.
Was a bit disappointed with the time honoured 'countdown to death/saved in the nick of time' scenario that we've seen in countless other films.