<P> Zombie, Nugget and Megan are in the helicopter, which has been circling the base waiting for General Order 4 to be turned off . The pilot and soldiers suddenly stiffen and die . Zombie realizes Ringer or Cassie must still be alive and activated the kill - switch . The trio survive the helicopter crashing by jumping into a river, Zombie, Nugget, and Megan . As they head to the base, they see a green light launch and head towards the mothership . </P> <P> Cassie realizes she has no fear as she is no longer alone, with the memories and emotions of 10,000 people in her mind . She finds the explosive pill in her pocket and recognizes it from one Megan had (previous book), which is activated by the carbon dioxide in a person's exhaled breath . The escape pod dock on the giant mothership, the size of Manhattan, and sees that it is filled with the high explosives that are to be dropped on Earth's cities . She recites her and Sammy's nighttime prayers one last time, bites down on the pill, and breathes . </P> <P> Zombie witnesses a large explosion from the mothership and it then disappears . He finds Ringer paralyzed in the hallway and realizes that Cassie has sacrificed herself to destroy the Others and their ship . </P> <P> Several months later, Zombie and Nugget are in a toy store in Texas . They come across a soldier with one hand in his shirt holding a wound--similar to a scenario Cassie experienced (in the first book). Nugget wants to kill the soldier and Zombie tells him that they don't do that anymore . Zombie tries to reason with the soldier, but the soldier pulls a gun and shoots himself in the head . Zombie and Nugget return to a house where Ringer is nursing her newborn baby girl she named Cassie . Outside, Evan Walker is patrolling--the 12th System saved him from the electrocution, and his human friends have re-downloaded his memories, returning his humanity . Evan tells Zombie that he plans to go to as many 5th Wave military bases as he can and destroy them, calculating that for every life he takes, 2 will be saved . As Evan leaves, Nugget watches from the house . He asks Zombie about the constellation that was his sister's namesake, and Zombie points out that 3 of the stars are a throne that the constellation Cassiopeia sits on, from which Cassie now sits to watch over the realm . </P>

The 5th wave who does cassie end up with
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