Baseball. Washington at Philadelphia (Channel 5 at 1).

Auto Racing. NASCAR's Durock 300 (Channel 4 at 2).

Golf. Third round of the PGA Tour John Deere Classic in Silvis, Ill. (Channel 7 at 2); third round of the LPGA Jamie Farr Classic in Sylvania, Ohio (ESPN2 at 4); third round of the Seniors Players Championship in Dearborn, Mich. (Channel 9 at 4).

WNBA Basketball. The all-star game (Channel 7 at 4).

MLS Soccer. Kansas City at D.C. (ESPN2 at 6).

Public Affairs

To the Contrary With Bonnie Erbe. "On the Down Low" author J.L. King discusses black women and AIDS (Channel 32 at 10 a.m.; Sunday at 9:30 a.m. on Channel 26).

This Is America With Dennis Wholey interviews ranking government officials in South Korea on the political situation there and the prospect of unification with North Korea (Channel 32, 10:30 a.m.; Sunday at 6 p.m.).

Weekend Live With Tony Snow. The topic is the London bombings; guests include former CIA counterterrorism adviser Jeffrey Beatty (FNC at noon). James Gilmore, chairman of a federal committee considering homeland terrorism, appears tomorrow.

The Beltway Boys discuss the London attacks and the journalist contempt case (FNC at 6).

On the Story debuts at its new time with new hosts Kyra Phillips and Christiane Amanpour; CNN's Joe Johns, Jeanne Meserve, Richard Quest and Barbara Starr talk about the London attacks and the Supreme Court vacancy (CNN at 7; Sunday at 10 a.m.).

The McLaughlin Group discusses the events in London (Channel 4, 7:30).

Cable Premiere

Catscratch. Three cats (voiced by Wayne Knight, Rob Paulsen and Kevin McDonald) land in the lap of luxury when their rich owner dies and leaves every penny to them; tonight, one of the cats is on a quest to catch his first mouse (Nickelodeon at 8).

Prime-Time Movies

Punk: Attitude (2005). The punk rock movement of the 1970s and 1980s is the subject of this documentary featuring performances from the era and interviews with pioneers Tommy Ramone, Glen Matlock and Steve Jones of the Sex Pistols and Mick Jones and Paul Simonon of the Clash (IFC at 9).

The Colt (2005). When a Union soldier's mare gives birth to a beautiful colt in the heat of battle, he risks his life to keep them alive (Hallmark Channel at 9).

Gordon, Blik and Waffle are the stars of the new Nickelodeon series "Catscratch," debuting at 8.