The Uninvited - S1.E9

A young boy called Ben goes out searching for his lost dog and he goes through a wormhole to another dimension and finds his dog in this dimension. He ran home to find a woman and a girl claiming that the dog was theirs. But because something from another dimension was in that dimension, the world begins to be swallowed up. To save the world in both dimensions, Ben, Mark and Song Li have to retrive the dog.