On TV tonight
90210, 8 p.m., CW Now that Tristan Wilds apparently is dating Rihanna or something, we have to watch this week's episode to see what Dixon is all about. Oh, and other stuff happens, too.
The Biggest Loser, 8 p.m., NBC The five survivors get a visit from Suze Orman about finances and former NFL star Rod Woodson runs a challenge. We don't know which one would tire us more.
MIDSEASON FINALE V, 8 p.m., ABC This retread of the classic '80s miniseries has been setting up the pieces and moving pretty slowly. Too bad it's going on hiatus until after the Olympics, by which time we will have forgotten about it entirely. Pity.
SEASON FINALE Dancing With the Stars, 9 p.m., ABC We find out who the big winner is. Apparently it's Whitney Houston, who gets to perform live to fill up a two-hour show.
Explorer, 10 p.m., NatGeo Scientists recreate what would happen if a 6-mile-wide asteroid hit the Earth. It can't be all that bad, because we're all still here.
— Joshua Gillin firstname.lastname@example.org