Reality shows are tweaking old formulas

[Warning: Possible spoilers for fall reality shows abound. If you don't want to know, don't read.]

This fall, familiarity is the name of the network reality TV game. Of the nine shows that populate the network's fall primetime lineup, all except one will be a new season of a returning show. Summer was full of experimentation, and there were some successes ("Dancing with the Stars," "Hell's Kitchen," "Beauty and the Geek"). But for fall, it's back to established hits.

There will be a number of twists on familiar formulas, though. From Martha Stewart's version of "The Apprentice" to an "Amazing Race" run by kids and their families, networks are trying to keep older shows fresh.

"The Amazing Race 8"
As its popularity has increased over the past year, during which three seasons have aired, "The Amazing Race" has also been subject to controversy. Its eighth season hasn't even aired yet, and already some fans are upset with the series. That's because, for the first time, as part of a special family edition, children as young as eight will be allowed to race. Teams of four may include younger children, or could include other people connected by blood and marriage.

There are also rumors that "The Amazing Race 8" will not leave the continent. The highly visible production was spotted filming at well-known locations all over North America, and thus it does seem as though this may be a lighter version of the intense around-the-world race that comprised the first seven seasons. In addition, a cast member from an earlier season has floated rumors that the whole show would be shelved because of kid-related problems. Since CBS has the series firmly on its schedule, that looks unlikely now, but we'll see if younger racers and a relaxed itinerary make for compelling television.

Premieres Sept. 27; airs Tuesdays at 9 p.m. ET on CBS

"America's Next Top Model," cycle 5
Although "Top Model 5" again will feature a group of skinny women competing for a modeling contract, their quest just got a little easier. Acerbic, frightening judge Janice Dickinson will not be back. In interviews, she's said she asked for more money and was fired from the show. She'll be replaced by Twiggy. The only other consistently bitchy judge, Nole Marin, is also leaving, replaced by runway coach J. Alexander. Without its versions of Simon Cowell, will the series still be able to capture our attention?

Premieres Sept. 21; airs Wednesdays at 8 p.m. ET (rerun Tuesdays) on UPN