Who Am I? -- The "mind" and "self" were formerly the domain of philosophers and priests. But the program discusses how neurologists lead the charge on profound questions like "How does the brain make me?" The show stares into the mirror with Dr. Julian Keenan, reflects on the illusion of selfhood with British neurologist Paul Broks, and contemplates the evolution of consciousness with Dr. V. S. Ramachandran.

Green Beret and poet, Colonel Robert Schaefer of the U.S. Army, hosts the voices of veterans remembering their comrades. The program hears from troops returning from Iraq and Afghanistan, reading their emails, poems and journals, as part of the NEA project: "Operation Homecoming: Writing the Wartime Experience." The show also hears interviews from StoryCorps, an essay from "This I Believe," and the sounds of a Military Honor Guard. And it visits a "Last Post" ceremony by Belgian veterans honoring the WWI British soldiers who died defending a small town in western Belgium.

For the Fallen -- Green Beret and poet, Colonel Robert Schaefer of the U.S. Army, hosts the voices of veterans remembering their comrades.

Chroniclers of Technology: An Evening with David Kirkpatrick, Steven Levy & John Markoff -- David Kirkpatrick, Steven Levy and John Markoff are three of the most prolific tech writers in the country and have been friends for almost 30 years. Levy is a senior writer for Wired Magazine and the author of seven books, many of them bestsellers, on everything from computer hackers and cryptography to the inside stories of the iPod's invention and Google's birth. Kirkpatrick, long-time Fortune Magazine writer and now chairman of the Techonomy conferences, wrote the behind-the-scenes story of Facebook's founding and explosive growth in the bestselling book "The Facebook Effect." Markoff, a senior writer for The New York Times, began writing about technology in 1976 and joined the Times in 1988.