Menacing sci-fi horror film from writer-director Jordon Peele has a brother-and-sister team of Hollywood animal wranglers (Daniel Kaluuya and Keke Palmer) interacting uneasily with unseen but distinctly hostile aliens. In an effort to document the existence of the extraterrestrials, they enlist the help of an electronics store clerk (Brandon Perea) with a knowledge of surveillance cameras and a hard-bitten but crossdressing cinematographer (Michael Wincott). Peele turns the siblings’ quest to reap fame and fortune from the dangerous situation in which they find themselves into a parable about the yearning for a fresh start as well as the grasping greed that lay beneath the apparently heroic surface of the Old West as portrayed in innumerable cowboy-themed movies and TV shows. But, though ambitious and striking, his narrative ultimately feels unfocused while the inclusion of much disturbing material, including a subplot about the owner of a theme park (Steven Yeun) who, as a child actor, witnessed a bizarre massacre on the set of a popular sitcom, makes it an inappropriate choice for casual viewers of any age. Numerous gruesome and gory images, drug use, a transvestite character, about a half-dozen profanities, a couple of milder oaths, constant rough and crude language. The Catholic News Service classification is L — limited adult audience, films whose problematic content many adults would find troubling. The Motion Picture Association rating is R — restricted. Under 17 requires accompanying parent or adult guardian.