Track and field joins the usual swimming and gymnastics on tonight's Olympic Games (Channel 4 at 8).
NFL preseason football (Channel 5 at 8) continues with the Oakland Raiders vs. Tennessee Titans.
Are you in Natasha Bedingfield withdrawal without new episodes of "The Hills"? You're in luck; the pop star stops by the season finale of "Degrassi: The Next Generation" (The N at 8).
Celebs put on their best Southern drawls on the Season 2 opener of "Gone Country" (CMT at 8), on which singers like former 'N Sync-er Chris Kirkpatrick and rocker Sebastian Bach compete to become country stars.
Bloomberg News's Janine Zacharia, Vanity Fair's Todd Purdum and Politico's Gebe Martinez join "Washington Week With Gwen Ifill" (Channel 26 at 8, Channel 22 at 8:30) to discuss the Russia-Georgia conflict and how the presidential candidates are approaching the Hispanic vote.
"Meerkat Manor" (Animal Planet at 8:30) bears a striking resemblance to the "Big Brother" house as the creatures battle for food and power.
Bobby Brown, Maureen McCormick and Carnie Wilson open a bed-and-breakfast in the Great Smoky Mountains. Sounds like the opener of a joke, but it's the series premiere of " Outsider's Inn" (CMT at 9).
Tom and Trina host a quirky couples' night out with the Millers on "Swingtown" (Channel 9 at 10), with line-dancing on the agenda.
"20/20" (Channel 7 at 10) investigates the disappearances of two young women who vanished in 2004.
BET premieres "The Truth With Jeff Johnson" (at 11), a half-hour talk show that examines political and social issues affecting African Americans.
"Late Show With David Letterman" (Channel 9, 11:35) hosts actor Ben Kingsley, comedian Artie Lange and musical guest Emmylou Harris.
Singer Mariah Carey chats with Jimmy and performs on "Jimmy Kimmel Live!" (Channel 7, 12:05), and legal commentator and TV host Dan Abrams visits the show.
"The Late Late Show With Craig Ferguson" (Channel 9, 12:35) features actress Radha Mitchell and comedian Aaron Karo.
-- Emily Yahr