90210 (8pm, CW) - In the Season 4 premiere, Naomi adjusts her lower social status at college while also digesting the news of her pregnancy. Also, Adrianna wants to redeem herself and Dixon needs a place to live.

Ringer (9pm, CW) - In the series premiere, ex-stripper Bridget (Sarah Michelle Gellar), a recovering drug addict slated to testify in a murder trial, flees protective custody and reunites with her wealthy twin Siobhan, who soon disappears while on a boating excursion. In a desperate attempt to avoid the feds and mobsters now hunting her, Bridget passes herself off as Siobhan, but soon learns the new role hasn't made her safer. Read Adrienne's opinion.

Parenthood (10pm, NBC) - In the Seaon 3 premiere, Sarah approaches her 40th birthday and turns to Mr. Cyr for support. Meanwhile, Adam worries about providing for his family and considers joining Crosby in a business opportunity.

Jacqueline Kennedy: In Her Own Words (10pm, ABC) - In audio interviews conducted by historian Arthur Schlesinger Jr. not long after President John F. Kennedy was killed in November 1963, Jacqueline Kennedy talks about her life in the White House, her marriage and family, and the events faced by the Kennedy administration. Her daughter Caroline Kennedy is also interviewed by Diane Sawyer.

Sons of Anarchy (10pm, FX) - Clay makes a deal with the Mayans that won't be easy to sell to the club, and the Russians aren't exactly in his corner, either.

"Ringer" (9 tonight, the CW) brings back Sarah Michelle Gellar as identical twin sisters, one poor and rehabbing and on the run; the other rich and miserable.

When the rich one seemingly commits suicide, poor sister steps into her life -- and her problems. Those problems include a trouble marriage and an especially tricky affair. And then there's the fact that poor sister is wanted alive as a witness by the police and wanted dead because she witnessed that crime.

Though nowhere near the smart, nuanced storytelling of "Buffy, the Vampire Slayer," the show's fun; there are a lot of delicious twists to build on. Sadly, the CGI budget must be small; I think I could see the green screen when the two Sarahs appeared together.