Threshold: Alienville

Molly and Cavannaugh travel to the town of Allenville to investigate a scientist whom they believe is actually one of the aliens. They discover a beacon he's constructed, designed to guide another alien probe to Earth, this time right over Washington, D.C. Meanwhile, Nigel, Lucas and Ramsey deal with the infected mother when they realize that she is trying to poison her baby; and, once Allenville is contained, Molly receives a message through a dream telling her that the humans will eventually prevail and Earth will be saved, but that she will pay the ultimate price in saving it.