I don't have a problem with the odd unknown such as who was on the station platform. Perhaps it was just some random stranger.

I think that the ending was fairly satisfying, but the whole thing dragged on for far too long. Fiona disappointed me by not reporting her husband, but I'm glad that he got his comeuppance eventually, although the rocks falling from the ceiling around Caitlin could've been explained better. I felt physically sick when Gail was feeding her daughter's ashes to the dog, and Seth's murder were unnecessary, but other than that it was the best of the five episodes.

I think that the ending was fairly satisfying, but the whole thing dragged on for far too long. Fiona disappointed me by not reporting her husband, but I'm glad that he got his comeuppance eventually, although the rocks falling from the ceiling around Caitlin could've been explained better. I felt physically sick when Gail was feeding her daughter's ashes to the dog, and Seth's murder were unnecessary, but other than that it was the best of the five episodes.

 

Fiona was just generally weird. I'm sure she was this person with good intentions, and she wanted to believe Everett was bad, which was why she stalked and framed him. I reckon deep down she knew all along her husband did it, as it's likely she saw him and Hattie getting in to the car, which probably explains their daughter's weird behaviour and why se was adamant they saw Hattie. She must have been bat-shit crazy.