Where can I watch Dark Matter in United States?

Liu Xing a brilliant Chinese student, arrives at University and makes the transition into American life with the help of Joanna Silver. Xing joins a cosmology group working to create a model of the origins of the universe. He is obsessed with the study of dark matter and a theory that conflicts with the group's model. When he begins to make breakthroughs of his own, he encounters obstructions.