Don't Blink (2014)
One of my all time favorite Dr. Who episode is called Blink. There is a species that when observed, appear to be a stone angel. The moment you look away, faster then you can imagine, you are transferred out of your time into a past time. The angels (aka the weeping angels) feed off the energy. I really love this episode, and it features Carrie Mulligan before she became a big star.
Don't Blink is not the Dr. Who episode, but people do inexplicable vanish when not being observed. The first time I watched this streaming movie on Netflix, I only made it through something like 5 minutes. I could not bear to watch it. I just wasn't in the mood, and had I rated it, I would have given it 2 stars. But I gave it another chance and enjoyed it, despite being inspired by the Dr. Who episode, but not being as good in terms of mystery, and I gave it 4 stars. State of mind and emotional state matter so much. I'm not sure it deserved 4 stars.
One surprise was I noticed one of the actors, she had these big "doe eyes" and I thought "is that Myka from
Warehouse 13?" Indeed it was Joanne Kelly.