2/12/2021 Ian Samuels adapts Lev Grossman's time-loop teen romance in an Amazon film starring Kyle Allen and Kathryn Newton. The time-loop genre is old and diverse enough now — I've reviewed around a dozen, and I'm sure I've missed several — that there's no need to describe each new entrant as "like Groundhog Day." There's the Edge of Tomorrow-like sci-fi action loop; the Happy Death Day mystery; the teen romp; allegorical horror film; and so on. Given the format's friendliness to low budgets, many of these pictures premiere at fests and disappear; but last year's delightful Palm Springs demonstrated the commercial viability of one variant: the "we're in this together" rom-com, in which two people relive a looping day instead of one, facing the prospect of a will-they/won't-they love story that might actually go on forever.