War Of The Worlds - Season 2 -

Bill injects Emily with the virus; she falls ill, forcing a dangerous mission for insulin.

Catherine discovers the method of alien travel (space and time) via computer algorithms. War of the Worlds - Season 2

The groups unite; they realize the invaders are actually their own future descendants. Bill injects Emily with the virus; she falls

In the finale, Bill uses a time-travel formula to go back to the day of the first contact. He kills Emily in the past to prevent the existence of the future human-invaders, successfully undoing the invasion and all deaths across both seasons. Episode Guide Key Events 1 In the finale, Bill uses a time-travel formula

Bill discovers the invaders look human; he considers using Emily to test his virus.

It is revealed that the invaders are not from another galaxy but are the descendants of Emily and Sacha , who traveled back from a distant future to harvest healthy organs and fix their genetic defects.