Black holes are the most enigmatic and exotic objects in the universe. They're also the most powerful, with gravity so strong it can trap light. And they're destructive, swallowing entire planets, even giant stars. Anything that falls into them vanishes...gone forever. Now, astrophysicists are realizing that black holes may be essential to how our universe evolved - their influence possibly leading to life on Earth and, ultimately, us. In this two-hour special, astrophysicist and author Janna Levin takes viewers on a journey to the frontiers of black hole science. Along the way, we meet leading astronomers and physicists on the verge of finding new answers to provocative questions about these shadowy monsters: Where do they com from? What's inside? What happens if you fall into one? And what can they tell us about the nature of space, time, and gravity?