Reliable Source: 'Mercy Street' actress L. Scott Caldwell gets inspiration from historic site

Hey, isn't that... Actress L. Scott Caldwell, poking around historic sites in Alexandria last weekend?The actress, best known as Rose the castaway in "Lost," wasn't your average tourist -- her visit was actually a research mission for her role in the upcoming PBS drama "Mercy Street," which is filming in Richmond but set in a Civil War-era Alexandria hospital.