''The Darkest Hour'' is a 2011 Russian-American film about a HordeOfAlienLocusts invading Earth. [[InvisibleMonsters Invisible]] except for occasional orange ripples, [[TouchOfDeath deadly to the touch]], and [[NighInvulnerability basically invincible]], they quickly slaughter everyone in their path.

Ben (Max Minghella) and Sean (Emile Hirsch), two American entrepreneurs, join up with their corrupt Swedish business partner Skyler (Joel Kinnaman) and two female tourists, Natalie (Olivia Thirlby) and Anne (Creator/RachaelTaylor) as they try to make their way out of Moscow.

!!Tropes in ''The Darkest Hour'':
* AchillesHeel: The aliens are for all intents [[NighInvulnerability completely invincible]] [[spoiler:while they're shielded and invisible.]] Even a direct hit from a ''armor piercing rocket'' only knocks off a [[ChekhovsGun chunk of metal]] the size of a man's fist. [[spoiler:When the shields are down, however, it's another story - it only takes a few seconds of [[MoreDakka sustained automatic small-arms fire]] to kill one. The real revelation comes when Sean throws that chunk of metal at an unshielded alien - it [[HoistByHisOwnPetard disintegrates like its victims did]].]]
* ActionSurvivor: Everyone has their moments, but Sean and Sergai stand out among all others.
%%* AnyoneCanDie
* ArtisticLicensePhysics: A radio is shown to work with no apparent loss in quality while inside Sergai's Faraday cage, [[spoiler: and later Natalie uses her cell phone inside a submarine.]]
* BadassBookworm: Sergai, an electrician, made [[spoiler:an improvised Faraday cage and microwave gun]] to combat the aliens.
* BizarreAlienBiology: [[spoiler:The aliens are metallic lifeforms, and thus consume conductive metals to survive.]]
* BizarreAlienSenses: The aliens sense electricity. [[spoiler: This means they can't see through glass.]]
* CatScare: A ''breeze'' freaks the characters out when they mistake it for the invisible movements of an alien.
* ChekhovsGun: The chunk of metal that falls off one of the aliens after it takes a direct hit from an ''[[NighInvulnerability armor piercing rocket.]]'' [[spoiler:When Sean throws it at an unshielded alien, it [[HoistByHisOwnPetard disintegrates like its victims did]].]]
* DoesNotLikeShoes: During the first half of the film, Natalie removes her high heal shoes, and runs around in her bare feet for quite some time before gaining a pair of boots.
* DwindlingParty: Oh yeah.
* EarnYourHappyEnding: The film ends with a limited number of survivors (including a few of the protagonists) going to rendezvous, [[spoiler: effective weapons against the aliens developed]], and the possibility that [[spoiler: the aliens will just up and leave once they're done taking what they need.]]
* {{EMP}}: The aliens' arrival causes this, knocking out basically everything that wasn't somehow shielded.
* TheEndOfTheWorldAsWeKnowIt
* EnergyBeings: The aliens are implied to be this, [[spoiler: but it's subverted later on. They're actually metallic heads with razor-sharp tentacles/rings inside an invisible shield.]]
* FiveRoundsRapid: Used by the Russian Spec-Ops on their BigDamnHeroes EstablishingCharacterMoment. Turns out that if you shoot them enough, the aliens ''will'' run away (it takes flamethrowers and ''direct bazooka hits'', though).
* {{Foreshadowing}}[=/=]TheCuckooLanderWasRight: A woman at the beginning (the one walling herself into her house) says "watch out for the lights". Later on they use lightbulbs as an early warning signal against the aliens.
* HoistByHisOwnPetard: [[spoiler:When an unshielded alien is struck by a piece of another one, it disintegrates like its victims did.]]
* InvisibilityCloak: The aliens [[spoiler: have shields which render them]] nearly invisible except for occasional electrical arcs on the surface. It also instantly vaporizes anything it touches, and can shrug off a direct hit from an ''armor piercing rocket''.
* IWillFightSomeMoreForever: Why the Russian Spec-Ops decide to stay behind in Moscow at the end: it's their home and they are going to keep fighting for it. And with the microwave guns, they have now a pretty good fighting chance.
-->"Today we have learned how to fight. Go and tell others what we know. This is the last day of extermination... and the first day of war."
* JerkassHasAPoint: While far from the nicest character, the {{Jerkass}} still has a point when he suggests going to the Swedish Embassy since it's closer.
* KillItWithFire: One of the early attempts to deal with the aliens. It doesn't hurt them, but the energy from the fire keeps them at bay.
* MolotovCocktail: The bartender at the nightclub tosses a few at the attacking alien (see above).
* MotherRussiaMakesYouStrong: Almost every Russian character is a badass in more or less extent in this movie.
* PlanetLooters: [[spoiler: The aliens only want Earth's resources, specifically conductive metals. Humans are just in the way.]]
* RussiansWithRustingRockets: Aside from the ActionSurvivor heroes, the only other group of people who are giving the aliens a fight are a group of Russian Spec-Ops that they meet later. Once the group manages to produce enough microwave guns, the Russians decide to stay behind and bring ''the war'' to the aliens.
* TouchOfDeath: Anything that touches the aliens [[spoiler: shields]] is disintegrated on contact.
* TrashcanBonfire: The Russian encampment is lit by a couple of burning trashcans.
* WarWasBeginning: "This the last day of extermination... and the first day of war."
* WeaksauceWeakness: [[spoiler: The aliens can't see through glass.]]
* WhenThingsSpinScienceHappens: [[spoiler: Once their shields are breached, the aliens are shown to be surrounded by spinning rings.]]
* {{Wormsign}}: The aliens are invisible, but their highly-charged shielding has the side-effect of powering any electrical device nearby. This even extends to light bulbs that aren't plugged into anything.