Ben: Our world is a better world.
Carol: I thought you fell asleep.
Oliver: I did fall asleep. I did. Last night, and this morning. Does that mean something bad?
Carol: That means you're immune, baby. It means you're immune.
Continuity mistake: The train that Carol takes from Washington to Baltimore is an Amtrak Acela Express train, as can be seen in the station and interior shots. The exterior shot of the train passing by shows a different type of Amtrak train.