Canadian Lt.-General (ret.) Romeo Dallaire may never fully come to terms with the horrific events that unfolded while he commanded the United Nations peace-keeping mission in Rwanda, but the emotionally scarred Dallaire is trying. Over 100 nightmarish days in 1994, more than 800,000 men, women and children were brutally murdered, despite the valiant efforts of Dallaire and his small number of peacekeepers.

Return to Sender is the emotionally charged story of a girl named Alexandra whose life is turned upside down when her Canadian adoptive parents send her back to Romania. For the past 13 years, she has been stateless-she belongs to no one, and to no country. In this film, Alexandra sets out on a mission to understand what happened during that very traumatic time in her life, and to try to regain her identity.

Prostitution Behind the Veil explores a side of Iran rarely seen or talked about. For over a year, director Nahid Persson filmed the everyday lives of two young female prostitutes as they eked out a living in a country where the profession is banned. The filmmaker often took great risks to follow Minna and Fariba as they sought out customers-men who would often marry them briefly, so as not to violate the laws of the Koran by having extramarital sex. The two women are good friends and neighbours, who have experienced the widespread mistreatment of women and the double standards that permeate Iranian society today.

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Frankensteer is a disturbing documentary that reveals how the ordinary cow has been turned into an antibiotic-dependent, hormone-laced potential carrier of toxic bacteria, all in the name of cheaper food. Frankensteer exposes the harsh and sometimes frightening realities of how our beef gets to our tables.

Have Earth's vibrant waterways become massive delivery systems for invisible poisons?

Intelligent Design takes on Darwinism in a sleepy Pennsylvania town.

One hundred and fifty years after the publication of On the Origin of Species, an unprecedented legal battle has gripped America over an illegal attempt to teach Intelligent Design, a theory that stipulates that nature is so complicated and existence so improbable that it cannot be accounted for by the processes of evolution. It is an essentially Creationist theory which claims a legitimate challenge to Evolution. As the world's media descended on a small U.S. town, even the President took an active interest.

The trial was Kitmiller et al vs. Dover District School in Harris, Pennsylvania. At stake was the question of how life began, and a group of highly educated scientists and professors fought to prove that the world was designed by God. The plaintiffs consisted largely of parents fighting for their kids' education. The Dover District School Board, an elected body of local notorieties, became the first in the USA to demand the teaching of the controversial theory of Intelligent Design.

Since the Dover School Board's fateful decision, the town has become the battleground for the latest skirmish in the war between religion and secularism. A War on Science asks: Is the argument of the prosecution merely Creationism in disguise? Has science been committing fraud on a massive scale? And can the gaps in evolutionary theory finally be resolved?

Narrated by Corey Lawson.

When the Duke and Duchess of Windsor sailed into Palm Beach, Florida on the SS Berkshire from Nassau on April 18, 1941, they were looking forward to enjoying three days of relaxation, playing golf, drinking and gossiping with American high society.

But unbeknownst to this infamous couple, the night before the ship docked, President Roosevelt had instructed FBI chief J. Edgar Hoover to launch what was to be an extraordinary covert intelligence exercise, one that had to fool both the exiled royals and the American secret service agents guarding them. The final FBI report, recently released under the U.S. Freedom of Information Act, running to 227 pages, reveals that the Duke and Duchess of Windsor harboured pro-Nazi sympathies and that Edward was earmarked by Hitler as a potential puppet king if Hitler defeated Britain.

There has long been a great deal of speculation about the Windsors and their political views, which has always been vehemently denied by the ex-king, the establishment and Philip Ziegler, the official biographer. But there is more than the sole FBI report that is damning. Recently, a number of key documents have been released, as well as British military intelligence reports and, crucially, the sensational publication of the diaries of Sir Alan Lascelles, the Duke's private secretary.

Together, these prove that Edward VIII's sympathies lay squarely with Hitler's regime. Now, for the first time in The Nazi King, the full inside story is told, in which Edward and his wife were warmly welcomed by Hitler in Germany and thereafter Edward passed on top secret Allied information to the enemy. It's a tale of treachery, corruption and depravity at the heart of the British monarchy - and one that could have changed the course of history.

Our reliance on energy may be costing us more than we realize. “Future Earth: Addicted to Power,” narrated by Sam Waterston, is the fourth premiere in the Future Earth series; keep checking futureearth.msnbc.com for information about our next show.