SEASON PREMIERE: This Poppy Montgomery series, in which she stars as an NYPD detective with eidetic memory, premiered on CBS, was canceled, was revived by CBS after international sales made it profitable to continue, then was canceled again. But instead of dying, Unforgettable has moved on – to a new home on A&E, with new episodes featuring a new supporting cast and a freer censorial standard. So Montgomery’s Carrie, in Season 4, swears more than she did before. Otherwise, this s