After their families were eaten, a female T-Rex and a caveman hunter form an unusual alliance held together by misfortune and face many prehistoric dangers. Primal sounds like kids’ entertainment, and it actually started out like that twenty years ago but has since been rebooted by animation wiz Genndy Tartakovsky as a shrill, action-packed, and pretty vicious adventure that takes a page or two from Ralph Bakshi’s and especially Frank Frazetta’s drawing book. This big-screen version mashes up the first four episodes of the eponymous animated series, wowing audiences without dialog—save a few grunts here and there—as an intense spectacle with tragic as well as infantile moments. And dinos, mammoths, and giant spiders. Yay!