Underwater

This is kinda spectacularly dumb action/horror, but with a bit more to reward it than a lot of films dumped into a January slot. For starters, it doesn't mess around with exposition - the characters are under threat pretty much from minute two of the film, and it doesn't let up much until the finale. The action does occasionally get a bit incoherent, and there are one or two annoying or underwritten characters (TJ Miller, who seems to be in this movie largely because it was shot in 2017 and has been hanging around waiting for release, and people weren't completely sick of him back then), and a few too many excuses to get the cast into their underwear, but Kristen Stewart is pretty engrossing as a lead and there is a nice build to a suitably bonkers finale (plus Jessica Henwick gets a fair bit to do in support). So if you're looking for a reasonable monsterthon, this may tick a box or two.