Battlestar Galactica is the best show on television (sorry, gotta call 'em as I see 'em, bias and all!), but 24 is a close second. The new season is off to a rousing start (Jack's back from China! More terrorists are terrorizing!), but like last year, if you really want to savor the 24 experience, you need to get on board pronto. This is not the sort of show you can jump into late in the game... "stand alone episodes" they're not.
I am struggling to avoid online spoilers, so I won't provide any here. But I continue to be impressed/amazed by the production values on this puppy, and the serial-like twists and turns.
PS: Unfortunately, 24 is going up against Heroes, another great show. It's an embarrassment of riches! Thank goodness for TiVo and multiple cable boxes!