Repulsion backward and onwards. And this sort of thing is pure, irresis-tible catnip for actors, the kind of role that almost guarantees a nomination, if not an award. (Oyelowo will no doubt receive one or both at next year's Emmys.)
Locke, but nowhere near as inventive or well-done), there is just about nothing to watch here except the star, who gives it all he's got and then some -- as these roles do require.
HBO now, and eventually, I'm sure, on DVD and a number of other digital venues, as well.