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.

Here's why you should never turn down a gig: You just never know what it will lead to down the road. Local old-time quartet Big Medicine would probably say amen to that. Last October, Quail Ridge Books owner Nancy Olson had Big Medicine in to play music for people standing in line at a Garrison Keillor book-signing. And hearing Big Medicine play was all it took for Keillor to get the group onto his long-running radio show, "A Prairie Home Companion."

"We were there playing along, having a good time," says Big Medicine's Joe Newberry. "And we did this a capella Watson Family song, 'The Lone Pilgrim.' Garrison Keillor stops signing books, turns around and sings along. He came over to talk afterward, and I was very impressed at his musical knowledge. Then he said, 'I'd like you to be on the show.' Great, I said, that'd be neat to do sometime -- thinking he was talking in general, hypothetical terms. 'No,' he said, 'in Durham. We're coming to play there and I'd like you to be on it.' So here we are."

The show is Saturday night at the Durham Performing Arts Center, and it's long sold-out. But you can hear the live broadcast of the show on WUNC, 91.5-FM. Winston-Salem's Polecat Creek is also on the bill.

"For any traditional musician, being asked to be on 'Prairie Home Companion' is a wonderful feeling," Newberry says. "It's a show everybody knows and respects. Sort of like comedians always wanted to get onto 'The Tonight Show.' And once you're there, if you get invited over to the couch, even better."