Girl in the fireplace did not, oddly, creep me out. The others did.

Also, I hate Coupling, because I dislike intentionally emotionally uncomfortable situations in TV. There's enough of those in reality for me. :)

It did not resolve because, unlike in empty child and blink, the creepy things were not neutralized. The child got resolved and fixed. The angels got stuck staring at each other. The damn darkness things just have a result of 'run', which is no solution at all.