Genre: Science, Nature, Anthology
Premise: This long-running, award-winning documentary series focuses on science, its many applications, speculation, history and researchers. Inspired by the BBC documentary program ``Horizons, '' the U.S. series frequently features interviews with scientists directly involved in the topic at hand, and sometimes even boasts footage of a particular discovery.
S41, E05 (First Aired: Feb. 5, 2014)
Maintenance workers stumble upon six caverns stacked with hundreds of skeletons in the Catacombs of Rome.