The CBS' new crime drama "Unforgettable," which premieres at 10 p.m. ET Tuesday (Sept. 20), get on the air. The series stars Poppy Montgomery as Carrie Wells, a former Syracuse homicide detective who left the force nine years ago when her memory became more burden than useful tool. She now lives in Queens, makes money counting cards at underground casinos and volunteers at a local nursing home.

That changes when a neighbor in her apartment building is murdered, and she's the first person to see the body, bringing her back into the orbit of the police force -- and, as it happens, her ex, Al Burns (Dylan Walsh), who's also in Queens and is the lead detective on the case. Walsh and Montgomery make for believable exes, both personally and professionally, and their interaction -- sometimes comfortable, sometimes prickly -- is one of the better aspects of "Unforgettable."

But the piling up of coincidences in Carrie's life puts a strain on credulity -- as does the fact that despite her gift, the one thing Carrie can't remember is how her sister was murdered when they were kids (it's her Dark Secret, and a big reason why she left Syracuse). The series also stars Michael Gaston ("Jericho"), Daya Vaidya and Kevin Rankin ("Friday Night Lights") as Al's fellow detectives.