The Darkest Hour (2011) presents a unique alien invasion premise where extraterrestrial beings arrive on Earth as invisible energy-based entities that attack through the planet's power infrastructure. Directed by Chris Gorak, this Russian-American co-production follows five young Americans trapped in Moscow who must band together to survive against these mysterious and deadly foes.

The film's strongest element is its creative concept of invisible aliens that can only be detected through electrical devices, creating constant tension as characters navigate a decimated Moscow. While the plot follows familiar survival horror beats, the Moscow setting provides fresh visuals compared to typical American-centric invasion films. The young cast, including Emile Hirsch and Olivia Thirlby, deliver committed performances despite some script limitations.

Viewers should watch The Darkest Hour for its inventive take on the alien invasion genre and impressive visual effects that bring the invisible threat to life. The film builds genuine suspense as characters use their wits and technology to detect and combat enemies they cannot see. Despite mixed reviews, it offers solid entertainment for fans of sci-fi thrillers looking for something different from standard invasion narratives. The Moscow backdrop and creative alien design make this worth watching online for genre enthusiasts.