“Walter” (Bill Murray) is a cranky old author who decides that he’s had enough of life and so leaves his wife “Barbara” (Noma Dumezweni) with a four-foot, four-legged, slobbering problem. She decides that the best place for “Apollo” is with his longtime friend “Iris” (Naomi Watts). Bluntly, she would rather stick pins in her eyes, but she’s a bit of a sucker for a sob story and so soon she he has a new roomie in her…

Naomi Watts inherits a 180-pound Great Dane after her mentor's suicide, and the film's whole trick is refusing to turn that into a cute rescue story. Apollo will not ride the elevator, takes over her bed, eats almost nothing for days, and Iris, a committed cat person with zero patience for dogs this size, has to learn to live around him instead of training him into something easier. What makes it work is how…