If you didn't catch CBS News' focus on Afghanistan last week, here's another chance to get educated.

Frontline presents "Obama's War," a thorough and powerful hour-long
look at the central questions facing the Obama administration and the challenges facing the American military. It airs Tuesday at 9 p.m. on UNC-TV.

Michael Davis, the author of a new book about the creation and history of the iconic children's television show, "Sesame Street," will be a guest on "North Carolina Bookwatch" this Sunday.

Davis's book, "Street Gang: The Complete History of Sesame Street," is told with the cooperation of one of the show’s co-founders, Joan Ganz Cooney, and covers not only the show as we saw it broadcast, but the personality conflicts that went on behind the scenes.

Davis tells host DG Martin that the show, which turns 40 years old this year . . .

Garrison Keillor: The Man on the Radio in the Red Shoes (8pm, UNC-TV) - A year in the life of Garrison Keillor focuses on his "Prairie Home Companion" radio program, as Keillor and his crew travel from town to town putting on their show.

Pitchmen (11am, Discovery) - In honor of show star Billy Mays, who died suddenly this past Sunday, Discovery is airing a "Pitchmen" marathon today starting at 11am. A new episode, the first season finale, will air at 10pm (Billy and Anthony "Sully" Sullivan help "Survivor: Africa" winner Ethan Zohn develop an alternative cereal bowl). Discovery will air special tribute promos throughout the 12-hour marathon, including some never-before-seen footage of Mays.

The Philanthropist (10pm, NBC) - Teddy travels to Myanmar on business and encounters a young girl who needs a kidney transplant. Her father is a match, but is being held in forced labor camp.

Click below for more photos from the taping of "Antiques Roadshow" in Raleigh on Saturday.

When I got the press rules for covering the "Antiques Roadshow" taping in downtown Raleigh on Saturday, I discovered that I was allowed to take an item with me for appraisal. The idea was to give me a unique perspective on the process.

I'm not sure I achieved that perspective, because I didn't have to wait in line for hours like the other 6,000 or so folks there. Happy for me, sad for them.

But I did get to speak to one of the show's appraisers who closely examined my treasures: a brown cast iron boot jack in the shape of a donkey's head with "Roosevelt" stamped in one ear and "In '32" stamped in the other; and its companion piece, a small, iron, braying donkey bottle opener with "F.D.R." stamped on its behind.

Chris Georgoulias of Raleigh brought his own treasure to the "Antiques Roadshow" taping on Saturday -- a chair from the movie "Planet of the Apes."

The chair looks like it was carved out of a gigantic piece of brown stone, and was hauled around the Convention Center by Chris on a dolly. Here's a close-up shot of the "Planet of the Apes" movie poster featuring the chair, or a chair like it.

Watch the video below of Chris explaining how he came to be the proud owner of such an item. He doesn't say whether or not he lets damn dirty apes sit in the chair.  

Appalachia: A History of Mountains and People, 10pm, UNC-TV

The new PBS documentary, Appalachia: A History of Mountains and People, is a fascinating look at the region from a mostly natural standpoint. It does spend ample time on the people of Appalchia, but the big star here is the mountain region itself.

Told in four hour-long segments and narrated by Sissy Spacek, tonight's first installment starts appropriately at the beginning. The very beginning: the actual forming of the mountains a half-billion years ago.

Back in 1987, the science series NOVA began following seven medical students, chronicling their educational journeys.

Among them was Elliott Bennett-Guerrero, now a doctor at Duke.

The first part of the show will be on Tuesday at 8 p.m. Over at our TV blog, we have an interview with Dr. Bennett-Guerrero.

Our TV blog talked to the doctor. Check it out here. 

In 1987, filmmakers from NOVA, the acclaimed science series, began filming seven Harvard Medical School students with the idea of chronicling what it takes to be a doctor.

Among them was Elliott Bennett-Guerrero, now an anesthesiologist and professor at Duke University Medical Center. Tuesday night at 8, you can watch the first part of the two-part special and see Dr. Bennett-Guerrero's journey.

 Dragonfly TV, 4pm on Friday April 3, UNC-TV

Some local school kids will be appearing on the Dragonfly TV show tomorrow afternoon. Dragonfly TV is a PBS series about science.

The local segment, titled "Where's Nano?" airs tomorrow at 4pm on UNC-TV, and focuses on nanotechnology. It was filmed at the Morehead Planetarium and Science Center on UNC's campus.

Randi Gibbs of Youngsville, shown here with her brother Anthony, is one of the students featured on the show. 

The other students are Linda Chen, Harrison Czajkowski and Regina Parker of Chapel Hill, and Jared Ballen and Lorenz Ferido of Durham.