Sandra Bullock, who has an offscreen role as an executive producer of "George Lopez" (8 p.m., ABC),

Sandra Bullock, who has an offscreen role as an executive producer of "George Lopez" (8 p.m., ABC), is in this repeat episode as Amy, the factory worker who's too klutzy to do the job safely.
In anticipation of its 25th anniversary Sept. 7, ESPN has been paying a fair amount of attention to itself. A look at "This is Sports Center" (10 p.m., ESPN) focuses on the signature show that gave new prominence to all those highlights clips.
Learn more about the cast on "Degrassi: Unscripted" (8 p.m., The N), five biographical specials over five weeks on the stars of this Canadian teen-age drama. The specials also will offer a sneak peek at the fourth season of "Degrassi," which premieres in October.
"Forensic Files" is celebrating its 200th edition (9 p.m., Court TV) with a week of new episodes. Launched four years ago, the series takes viewers along as investigators solve complex cases by analyzing forensic clues with state-of-the-art technology and techniques. Tonight, "Making the Collar" tells the story of 16-year-old Leanne Tiernan from Leeds, England, who, after a Christmas shopping outing, began her walk home and never arrived. Her body was discovered nine months later. Forensic evidence helped compile a portrait of her killer, who was later captured, tried and convicted.