Lisa Ling’s investigative documentary series goes behind the scenes to discover the secret societies within the American society.

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A journey to solve the mystery of a murder at sea and get immersed in the world of maritime crime.

Blood Relatives is an American documentary television series on Investigation Discovery that debuted on June 7, 2012. Narrated by Brenda Strong, the voice of Desperate Housewives character Mary Alice Young, the series examines murders that were committed within families. Blood Relatives has been renewed for a third season.

Professor Brian Cox asks the biggest questions we can ask. Are we alone? Why are we here? What is our future? Join him in a stunning celebration of human life as he explores our origins, our place and our destiny in the universe.

The documentary series aims to reshape the way the public sees cancer and strip away some of the fear and misunderstanding that has long surrounded it. The story of cancer is a story of human ingenuity, resilience, and perseverance but also of hubris, paternalism and misperception.

From roots in the Deep South to the slums of New Jersey, “Who Do You Think You Are?” follows the journeys of some of the most well-known names in American popular culture. Watch as celebrities discover unknown details about themselves and their families while researching their ancestry with the help of historians and genealogical experts.

American Greed, also called American Greed: Scams, Scoundrels, And Suckers and American Greed: Scams, Schemes, And Broken Dreams, is a weekly American “true crime” television documentary series aired on CNBC. The program is narrated by Stacy Keach Jr. and produced by Kurtis Productions.

The program focuses on the stories behind some of the biggest corporate and white collar crimes in recent U.S. history; examples include WorldCom, HealthSouth and Tyco International. In addition, stories about common financial crimes that affect scores of everyday citizens are also featured.

Other topics have included the story behind Nevada’s infamous Mustang Ranch, and rise-and-fall pieces on such highly successful, high-profile businesspeople as boy band impresario Lou Pearlman and Mark Dreier. The series has also produced specials on subjects like Bernie Madoff’s life behind bars, and how organized crime groups earn money. In season four, the show covered stories including high-profile cases such as Raffaello Follieri, Marcus Schrenker, and Sholam Weiss.

In this true-crime docuseries, veteran detective John Cameron investigates convicted serial killer Ed Edwards and uncovers mounting evidence that connects Edwards to some of the most infamous murder cases of the last 60 years, many of which are still unsolved. Cameron is joined by Edwards’s own grandson, Wayne Wolfe, as they search for the truth.

Documentary series profiling the work of high-speed police units across Britain.

A four-part documentary series that tells the stories of Jimmy Iovine and Dr. Dre — one the son of a Brooklyn longshoreman, the other straight out of Compton - — and their improbable partnership and surprising leading roles in a series of transformative events in contemporary culture.

The stories of a litter of puppies, and their human companions, as they go on a quest to become guide dogs for the blind.