It's been two years since the aliens invaded Earth and the fight continues. Charleston has fighters guarding the city to protect it from an alien attack. Instead, they are attacked by Humans that were sent by the President of the US. During that attack, Lee was fatally injured. Meanwhile, Tom finds out about Anne's concerns about Baby Alexis. He worries Anne is having a mental breakdown. During a memorial ceremony the aliens attack and Alexis is seen looking up at them and smiling. It's not in Anne's head. Hal comes clean to Maggie about his meetings with Karen. He believes he is the mole.