'Dancing' Sweeps Away Thanksgiving Week

· And finally, "The Unusuals," a cop show starring Amber Tamblyn -- seriously -- joins ABC's lineup on Wednesday, April 8 -- at 10.

But first, ABC News's "Primetime: What Would You Do?" returns Tuesday, Jan. 6 -- you know it's coming -- at 10.

CBS, meanwhile, will launch two new series -- one at 10, the other on Saturday.

· "Harper's Island," which is being billed as a "13-episode mystery event" (in the old days they'd call that a miniseries) will premiere Thursday, April 9, at 10. It's a serialized drama about a group of family and friends who travel to a secluded island for a destination wedding -- only in every episode, one of the guests is killed. CBS -- which, unlike the other broadcast networks, learned its lesson about serialized dramas after getting burned in the whole "Jericho" kerfuffle -- swears that "by the end of the 13 episodes, all questions will be answered, the killer will be revealed and only a few will survive."

· "Game Show in My Head," a hidden-camera game show from Ashton Kutcher, premieres Saturday, Jan. 3, and will air at 8 and 8:30 p.m. Saturdays. Joe Rogan, of NBC's "Fear Factor" fame, hosts as contestants perform "outrageous tasks" in public, for $5,000 each.

CBS will also bring back its summer drama "Flashpoint" on Jan. 9 to replace the canceled "Ex List" in the Friday 9 p.m. hour. And "Survivor" returns for its 18th edition on Thursday, Feb. 12, while the 14th round of "Amazing Race" is unveiled Sunday, Feb. 15.