As with most 'time-travel' movies, 'Call (2020)' asks you to take quite a few leaps of logic as it progresses towards its increasingly complex finale. However, if you accept the fact that its two timelines are, essentially, occurring concurrently, most of its narrative (sans one or two mostly harmless inconsistencies) makes perfect sense - or, at the very least, its issues are so small that they can safely be hand-waved away with no detrimental effect. The picture's most, I suppose, iffy moments come during a final, mid-credits interlude that seeks (successfully, I'll add) to insert one last sting into the thing's tail. Although this segment arguably isn't necessary and runs the risk of souring one's final impression, it does what it sets out to - for better or worse - without ruining anything it proceeds. That's all I'll say about the plot, let alone the ending, as I don't want to spoil any aspects of the generally unpredictable affair. It's fantastically subversive, side-stepping expectation in natural and genuinely interesting ways. As a result, it often has you on the edge of your seat. It's a brilliant thriller that builds upon its initial premise almost perfectly. It does eventually threaten to cross the line of credibility and become too much for its own good. It never does, though, and remains a thoroughly engaging, almost captivating experience throughout. It really is great. 8/10