Katie Couric investigates the concept of political correctness.

Katie Couric explores gender equality in the United States, asking whether Americans have arrived at a turning point.

Katie Couric examines the argument that anxiety among the white working class is fueling the political and cultural divide in the United States.

Katie Couric explores the many ways that technology upends people's lives.

Katie Couric learns about the pressures and opportunities for Muslim Americans.

Katie Couric explores the divisive issue of Confederate monuments.

Presidential elections in America always garner a lot of media coverage, but the 2016 campaign is bringing new meaning to the phrase "media circus" thanks to the presence of media-friendly Republican hopeful Donald Trump. The campaign really builds up steam as the calendar flips from 2015 to 2016, which is when this real-time docuseries begins its look at the campaigns of Trump, Democratic hopeful Hillary Clinton and others vying for a chance to spend at least four years in the White House. The series follows key characters and stories from the campaigns, providing behind-the-scenes access into a world the public rarely sees in its weekly half-hour episodes. Executive producers of "The Circus" include political analysts/authors Mark Halperin and John Heilemann ("Game Change").

E! is known for entertainment-centric shows, but "E! Investigates" goes beyond the entertainment industry and dives headfirst into serious topics. Among the topics that have been covered in detail are homicidal husbands, teen suicide and kidnappings.

Some people like to hop in a car to take a road trip across America, visiting as many landmarks as possible along the way. Since such a trek can take a while to complete, taking a flight across America might be a better option for some people. "Aerial America" takes viewers on such a flight, offering rare looks at some of the nation's best-loved landmarks from high in the sky. Cameras capture the history and pageantry of America as they zoom over busy cityscapes and quiet, rural lands. Many episodes focus on a specific state, showcasing highlights of the state's beauty, while others revolve around themes such as the best small towns and natural wonders found in the country.

Anthony Bourdain had no reservations about a move to CNN. Shortly after concluding an eight-season stint at the helm of his popular Travel Channel series, the equally popular Emmy-winning host came to the news network searching for "Parts Unknown." In the hourlong weekend series -- similar in premise to Travel's "No Reservations" -- Bourdain explores the world to, he says, "eat and drink with people without fear and prejudice ... they open up to you in ways that somebody visiting who is driven by a story may not get." Enticed by the opportunity to experience cultures rarely visited by American TV, such as in the Congo, Libya and Myanmar, the chef and best-selling author also takes viewers to Colombia, Peru, Morocco and, closer to home, Koreatown in Los Angeles.

America is full of archaeological secrets buried in the earth. In this series, forensic geologist Scott Wolter -- considered a real-life Indiana Jones by some -- travels across the country to uncover some of the hidden treasures and to reveal the history associated with them, discovering in the process that there is a lot Americans don't know about the country's past, and the history that people do know may not always tell the whole story. Ancient symbols, religious relics and other artifacts that Wolter unearths indicate that various civilizations have left their mark on the nation.