Wednesday, Aug. 14, 2024 at 9 p.m. on KPBS TV / Stream now with the PBS app + Encore Sunday, Aug. 18 at 9 p.m. on KPBS 2. Dogs have long been dependable companions by our sides. But it wasn’t always that way, and a look at their closest living relative, the wolf, makes it clear why. Research into dog domestication and intelligence offers clues into the human-dog relationship.