CBS will flip its two Sunday dramas this week to see if it can goose the ratings for "Cold Case" and "Three Rivers."The one-week (for now) arrangement will move "Cold Case" to the 9 p.m. ET spot, where it aired last season to much bigger audiences than it's had so far this fall. "Three Rivers," the only new show this season whose future is still up in the air, will air at 10 p.m.(In reality ...
