The Missing
I think the final episode just about worked.
There's was an element of "Why the feck would you go into a haunted basement with just a candle?" about the final scenes but, thankfully, no open ending.
I'm tired of slogging through TV series where the final ending is actually just an intro to the next series, and nothing is resolved. I'll happily trade a heavy-handed explanation and recap of what I have just been watching for 8 weeks for that.