When “Keen Eddie” (8 p.m., Bravo) made its debut on Fox last summer, I was impressed, but confused about its place in the network firmament. This “fish out of water” comedy was a tad too quirky for network television and too brash for PBS, which broadcasts no end of London-based police fare. I was disappointed, but not very surprised, when the summer show disappeared faster than “Banzai!” But “Keen Eddie” fans need not despair. The show has landed back on cable, this time on Bravo, where it probably belonged in the first place.

• Viewers with a high threshold for heartache should not miss “Shelter Dogs” (6:30 p.m., HBO), an eye-opening look at just a few of the millions of dogs doomed to endure life in pounds and shelters every year. As this harrowing film makes clear, it is often more humane to euthanize these creatures than have them driven mad by incarceration.

Tonight’s other highlights

• Auditions good, bad and ugly unfold on “American Idol” (7 p.m., Fox).
• Luke’s tentative move makes Lorelai consider him on “Gilmore Girls” (7 p.m., WB).
• A bus accident may have been caused by racist harassment on “The Guardian” (8 p.m., CBS).
• Anne Heche, Diane Ladd and Kristen Bell star in the superior 2004 television drama “Gracie’s Choice” (8 p.m., Lifetime).
• Tom Brokaw anchors coverage of the New Hampshire primary (8 p.m., NBC).
• Sherry names her price for helping Palmer on “24” (8 p.m., Fox).
• A photo shoot on “America’s Next Top Model” (8 p.m., UPN).
• Two brothers cope with their mother’s addiction in the Oscar-nominated documentary “Why Can’t We Be a Family Again?” on “Independent Lens” (9 p.m., PBS).

Late night

Charlize Theron and Dave Matthews appear on “Late Show with David Letterman” (10:35 p.m., CBS) … Jay Leno greets Terry Bradshaw on “The Tonight Show” (10:35 p.m., NBC).