Exploring mysterious occurrences in history.

An in-depth look at what may have led to the King of Pop's demise; a celebration of Michael Jackson, one of the greatest talents of a generation.

The McStay family has not been heard from since Feb. 4, 2010.

HBO adds to its staple of late-night talk/comedy series with this entry starring Wyatt Cenac. The comic/writer explores a wide range of social and cultural issues facing Americans, using satire to tackle tough topics and investigate real-world solutions. Each episode features documentary-style field reports as its focal point. The segments allow Cenac to travel to suburban, downtown and rural parts of the country, where he talks with locals about systematic problems and offers comedic solutions to everyday inconveniences. In addition, the host engages an in-studio audience with commentary on current events. Cenac is a former writer and correspondent on "The Daily Show With Jon Stewart," where he earned three Emmy Awards.

From the ways in which people live and communicate to how they view the past, future and one another, American society is in the midst of seemingly head-spinning changes. To explore some of the most divisive, contentious and often confusing issues in today's culture, Katie Couric travels to dozens of cities across North America to talk with people at the forefront of this revolution. Covering pressing issues, including gender inequality, Muslims in America, political correctness, the battle over Confederate monuments and statues, and how technology is affecting humanity, Couric enlists cultural icons, experts and everyday people to help her look past the noise, politics and individual discomfort to understand complicated truths.

This award-winning series presents compelling untold stories and covers a wide array of provocative subjects. "Explorer" aired for 25 years -- the longest-running documentary series in cable TV history -- before being relaunched in 2015 after a five-year hiatus. Each monthly episode of the new "Explorer" takes a similar deep dive inside a story from the pages of a recent National Geographic magazine issue, taking viewers not only to the most remote corners of the globe but also to the furthest reaches of the mind and deepest crevices of history -- on urgent missions of discovery.

Veteran journalist Paula Zahn steps out of the studio and into the field to unravel criminal investigations, tracking the drama of each story by featuring the opinions of those closest to the case, including law enforcement officials, the families of the victims and the incarcerated, lawyers from both sides, and first-time TV interviews with convicted murderers.