Directed by Chris Gorak and produced by Timur Bekmambetov, the film centers on an invisible, electricity-based extraterrestrial threat. The Darkest Hour (2011) - IMDb

Aliens made of pure energy arrive on Earth. They are invisible and incinerate humans instantly. A small group of survivors must find a way to fight back using radio waves and makeshift technology.

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"The Darkest Hour" is a 2011 American science fiction horror film directed by Chris Terrio, who makes his directorial debut with this movie. The film stars Amber Heard, Nikolaj Coster-Waldau, and Brenton Thwaites. The movie's plot revolves around two American tourists, Alice (Amber Heard) and her boyfriend Paul (Brenton Thwaites), who find themselves in a remote Russian village while searching for a scenic spot to take some photographs. However, their romantic getaway turns into a nightmare when a strange creature, known as the "vyrykolkas," begins to hunt them down.