Black holes, "the most enigmatic and exotic objects in the universe," are the subject of this new two-hour episode of PBS's NOVA, aired on January 10, 2018. Hosted by astrophysicist Janna Levin, this documentary explores how black holes were discovered and how these strange phenomena may have shaped our universe. Along the way, viewers are introduced to Karl Schwarzschild, the astronomer who proved that black holes were mathematically possible (to a skeptical Albert Einstein) and Jocelyn Bell, the graduate student who discovered a neutron star in 1967 and Paul Murdin, who identified Cygnus X-1, the first black hole to be identified in our galaxy. Through this link, visitors can watch the full episode and view the episode transcript. In addition, this episode is accompanied by a number of shorter clips that may be of interest.