sentences:  The mayor attempts to stop his wife from leaving with the rest but begins to feel ill and, after Martha urges him to "give in", apparently dies, only to appear later in the tunnels among the returned.The military responds by gassing the returned with a chemical that induces a permanent coma.After guiding some of the returned to the tunnels, Mathieu makes his way back to Rachel, and recounts to her the events leading to his fatal car accident.