Well to this I can only say the following: tilt's head Huh?

I'll give you this, for a six episode series. WOW does it pack a bloody punch. It's got some amazing tension right from the git go almost leaning in to horror as no one bothers to turn on lights throughout the entire series. The score builds, you expect a shadow to pop out and every once in a while someone does. Little Benjamin does a perfectly solid job of being the stoic Isaac. For his profile Capaldi wasn't as big of a role as I expected but when he was used he was excellent. Jessica Raine was a wonderful leading lady.

Very quickly this transitions from a natural thriller into a supernatural one and then in your head you play the guessing game. Is it ghosts? Is it time travel? Is it Aliens because as The Doctor (or was it Sarah Jane) once implied the others are stupid choices. Something has to explain the things Isaac appears to see and talk to. Something has to explain the flashes of (stronger than) deja vu that Lucy has. Something has to link the schizo grandmother and her son.

Then there's the ending. Honestly as great as episodes 1-5 were. I'd let pretty much anything go with episode 6. I kinda wish there was a second series so we could get a more conclusive ending but what we have here in the terminal side is an ending you'll have to watch two or three times to really let it sink it.

I recommend it. Aside from the lighting where no lamps are on it's a very tight series. It fails to come together in the end. Well I wouldn't say that. We do get answers and those answers are satisfactory. It just fails to do anything with it. Having run out of episodes the series ends before we really can see where it's going next.

I'm not afraid of an open ending. I think The Matrix (1999) and Awake (2012) Season 1 both ended with fantastic open endings. They brought all the elements together. Did something and then showed us where they go next.