TONIGHT'S MUST-SEE

"House," 7 p.m., Fox. If you missed this season finale, catch the rerun now. Smart, strange and compelling, it's "House" at its best.

Injured in a bus accident, Dr. House has only shards of memory. Why was he on a bus? Who was that other passenger with symptoms of a deadly illness?

Stick with this. It affects key characters and the new season, which starts Sept. 16.

"The Shield," 7 p.m., FX; repeats at 8 p.m. The final season begins in full ferocity.

The Armenian mob knows Vic and other cops stole their money. Most of it was burned; they want revenge on Vic, his ex-wife and their kids.

Meanwhile, the drug cartel is working through a crooked businessman. Vic, his job in danger, has stolen a box of blackmail documents that others would kill for.

Director Guy Ferland lets the camera work get a little too raw and jumpy tonight. Still, it's a tough, involving hour.

TONIGHT'S ENIGMA

"90210," 7 p.m., CW. (Oceanic Digital Channel 93) Great skepticism surrounds this series, which CW would not show to critics. Still, let's remain hopeful for now. We're back to West Beverly Hills High, past home of "Beverly Hills, 90210." Kelly Taylor (Jennie Garth), from that show, is the guidance counselor.

A principal (Rob Estes) has arrived from Kansas with his wife, daughter and adopted son. The new kids are about to meet a new world; so are we.

OF NOTE

Republican convention, everywhere. Coverage starts at noon on CNN, 1 p.m. on C-SPAN and MSNBC, 2 p.m. on PBS, and 4 p.m. on ABC, CBS and NBC.

"Gavin and Stacey," 2:40 p.m., BBC America (Oceanic Digital Channel 341). In last week's charming and funny opener, two people finally met (after months of phone talk) and fell in love. Now comes a misunderstanding, an emergency meeting and more. The British accents are tough, but this is still a dandy series.

"America's Got Talent," 7 p.m., NBC. Ten more acts perform and viewers vote. This phase concludes tomorrow.

"Life-Size" (2000), 7 p.m., Disney Channel. Lindsay Lohan deals with her drab life (this was a long time ago) by bringing her fashion doll to life (Tyra Banks). It's a pleasant film.