Montana's Medical Marijuana law has been the subject of intense controversy and criticism. While the media has covered the social issues well, there has been little discussion about the science. MontanaPBS's new documentary, Clearing the Smoke, reveals how cannabis acts on the brain and in the body to treat nausea, pain, epilepsy and potentially even cancer. Extensive interviews with patients, doctors, researchers and skeptics detail the promises and the limitations of medicinal cannabis. Watch online now.

In celebration of his 85th birthday, the legendary Tony Bennett released the critically acclaimed Duets II, which followed his Grammy-winning Duets CD, released in honor of his 80th birthday. Joined by a diverse roster of contemporary artists, including, Lady Gaga, John Mayer, Michael Buble, k.d. lang, Sheryl Crow, Willie Nelson, Queen Latifah, Norah Jones, Josh Groban, Andrea Bocelli, Faith Hill, Alejandro Sanz, Carrie Underwood and Amy Winehouse in what became her last recording, the sessions were filmed to capture the magic of these performers singing with the master of the Great American Songbook: Tony Bennett.

Multiple Emmy winner "Downton Abbey" resumes the story of aristocrats and servants of Downton Abbey during the tumultuous World War I era. The international hit, written by Julian Fellowes, stars Dame Maggie Smith, Elizabeth McGovern and Hugh Bonneville, as well as a drawing room full of new actors, portraying the loves, feuds and sacrifices of a glittering culture thrown into crisis.

Slavery by Another Name director Sam Pollard receives standing ovation at the world-premiere screening of Slavery of Another Name at Sundance Film Festival

The Film: Slavery by Another Name challenges one of Americans' most cherished assumptions: the belief that slavery in this country ended with the Emancipation Proclamation. The film tells how even as chattel slavery came to an end in the South in 1865, thousands of African Americans were pulled back into forced labor with shocking force and brutality. It was a system in which men, often guilty of no crime at all, were arrested, compelled to work without pay, repeatedly bought and sold, and coerced to do the bidding of masters.