DARK Stream on Netflix. The first season of this German psychological thriller opens as a murder mystery and evolves into a full-blown time-travel epic. When a high schooler discovers that a young boy hasn’t just gone missing, but has actually traveled back in time, he uncovers a mystery that reaches back generations, and ultimately affects the fate of everyone in his small town. The series sends its characters traveling between three different coordinates in time — where they meet their ancestors as well as stumble across their future selves — and poses mind-bending theories of how one small act can change the course of human history. The second season picks up sometime in the future, after what appears to be an accident at the town’s nuclear power plant. It’s a perfect show for fans of “Stranger Things,” “Chernobyl” and European crime thrillers like “Broadchurch.”

JULIET, NAKED (2018) Stream on Amazon and Hulu; Purchase on Amazon, Google Play and YouTube. This romantic comedy, based on a Nick Hornby novel, centers on an incredible love triangle: a music superfan, his girlfriend and his idol. Chris O’Dowd plays the oblivious boyfriend to Annie (Rose Byrne), and runs an obsessive fan site for the ’90s rocker Tucker Crowe (Ethan Hawke). When Annie posts a negative review of a bootleg Crowe CD online, the musician emerges from obscurity to respond. The two strike up an intercontinental email correspondence that leads to an in-person flirtation when the musician winds up in the couple’s coastal English town.