Body Harvest

The year is 2016. Humanity has been reduced to a few survivors inhabiting the orbital space station Omega. Over the course of the history, aliens visited the Earth every twenty-five years, "harvesting" humans as an organic material. Eventually, they launch an assault on the last remnants of the human race. But Adam Drake, a genetically engineered soldier, comes into possession of a time-traveling device. He uses it to travel to the time periods of human history when aliens performed their deadly attacks. The fate of humanity is in his hands.