When does I Know This Much Is True return?

I Know This Much Is True is an American drama television miniseries directed and co-written by Derek Cianfrance. The series stars Mark Ruffalo in a dual role as twin brothers Dominick and Thomas Birdsey. Ruffalo's performance won him a Primetime Emmy Award, a Golden Globe Award, and a Screen Actors Guild Award. The show takes place in Three Rivers, Connecticut, in the early 1990s.