24 series 5 airs for two hours tonight and then two hours tomorrow night, then it's back to its Tuesday 9pm slot IIRC.
http://www.pogdesign.co.uk/cat/ Very useful site with similar information - thought a link would be a good addition to the thread.
Any one in watch Prison break? If so, it's suposed to start back up in march on mondays, I belive at 7 or 8 pm.