CSI remains the #1 show on TV for another week, by a margin of around 2.5 million viewers and 0.6 household ratings points compared to Dancing With the Stars. Considering how fall Dancing has fallen this week, my guess is that they will retain it for a third week in a row, no matter how well or badly it does on Thursday night. Grey's is currently the #3 show, trailing CSI by an entire ratings point in households and roughly 3.4 million viewers. With CSI currently at 23,095,000 viewers overall, it will take quite a while for them to be dethroned, even if their ratings continue to slide. My guess is that unless Dancing has a huge finale or suddenly starts seeing a surge, only American Idol will knock CSI off if it continues at around 21 million viewers per episode and Grey's continues at its current numbers.