In the mildly entertaining Sandra Bullock vehicle, “Bird Box,” alien invaders were presumed so fearsome to behold that all who gazed upon them immediately offed themselves. Possibly to save audiences from a similar fate, we were never permitted to see these terrors, leaving us as sightless as the movie’s scrabbling survivors. Transplanting the basic premise to Spain, the directors Àlex Pastor and David Pastor have come up with a spinoff feature, “Bird Box Barcelona,” minus Bullock but with the addition of a rather nifty — and depressingly credible — faith-based twist. Nine months after the aliens’ arrival, an engineer named Sebastián (Mario Casas) and his young daughter (Alejandra Howard) are searching for survivors in a city where the remaining humans are as feared as the invaders. Yet as Sebastián gains the trust of successive ragtag groups, he soon reveals a purpose that’s far more terrifying than robbery.

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Persons: Sandra Bullock, Àlex, David Pastor, Bullock, Mario Casas, Alejandra Howard Locations: Spain