Edge of tommorow

Rita Vrataski(left)
William Cage (right) 

Omega

Alpha

In a near future in which an alien race has hit the Earth in an unrelenting assault, unbeatable by any military unit in the world. Lt. Col. Bill Cage is an officer who has never seen a day of combat when he is unceremoniously dropped into what amounts to a suicide mission. Killed within minutes, Cage now finds himself inexplicably thrown into a time loop-forcing him to live out the same brutal combat over and over, fighting and dying again and again. But with each battle, Cage becomes able to engage the adversaries with increasing skill, alongside Special Forces warrior Rita Vrataski. And, as Cage and Rita take the fight to the aliens, each repeated encounter gets them one step closer to defeating the enemy.Cage finds Vrataski at Heathrow. Together they meet with Dr. Carter, a former government scientist and expert in Mimic biology. Cage learns that the kind of Mimic he killed in his first loop, an "Alpha", resets time when it is killed to give the Mimics an advantage in battle. Cage inherited this ability when he was doused in the Alpha's blood as they both died. Vrataski had this ability in a previous battle but lost it after receiving a blood transfusion. She tells Cage that they must hunt the Mimics' hive mind, the Omega.Over several loops Vrataski trains Cage into a more effective soldier. In one loop he flees to London, where he learns that the Mimics will overrun humanity after the invasion if he fails. He and Vrataski spend several loops learning how to survive the battle on the beach and get inland based on his vision of the Omega hiding in a Bavarian Alps dam. After numerous loops end in Vrataski's death, Cage decides to hunt the Omega alone, abandoning her and the rest of the invasion to doom on the beach. When he arrives at the dam, he discovers that the Omega is not there. He manages to kill himself before an Alpha can steal his blood and prevent him from resetting the day. Back at Heathrow, he tells Vrataski and Carter that his vision was a trick. Cage and Vrataski adopt a new approach: they infiltrate the Ministry of Defence in search of a prototype built by Carter that will allow Cage to discover the Omega's true location. After several failed loops they obtain the device, which reveals that the Omega is located under the Louvre Pyramid in Paris. They are injured as they flee, and Cage's life is saved by a blood transfusion, which removes his ability to reset the day. Vrataski frees Cage and they return to Heathrow, where they convince his squad to help destroy the Omega. The other squad members sacrifice themselves to get Cage and Vrataski beneath the Louvre. Vrataski distracts a waiting Alpha while Cage advances on the Omega. The Alpha kills them both, but not before Cage primes and drops a grenade belt into the Omega's core, destroying it and neutralizing the other Mimics. Cage's body absorbs the Omega's blood. He wakes up en route to his meeting with Brigham the day before. Brigham announces that Mimic activity has ceased following a power surge in Paris. Cage is never arrested and goes to Heathrow to meet Vrataski, who does not recognize him. She asks what he wants, and he smiles and laughs.

Human army: Major William Cage, Sergeant Rita Vrataski, Master Sergeant Bartholomew Farell, General Brigham, Griff, Kuntz, Nance, Skinner, Ford, Takeda and Kimmel.
Scientist: Dr. Carter.
Mimics: Alpha and omega.