I am so, so jealous of Andy Bernard's sweet Lion-O costume. You have no idea. The Office (NBC, 9 PM)

It's Halloween Eve, go watch the Winchester boys do their thing on Supernatural (CW, 9 PM).

30 Rock (NBC, 9:30 PM) season premiere night! And this time, we don't have to put up with the presence of Jerry Seinfeld!

Sweet Dee has a heart attack on It's Always Sunny in Philadelphia (FX, 10 PM) tonight, which surprises me, because I thought having a constant stream of alcohol running through your veins would thin up your blood enough to save you from such troubles, thus causing you to live forever. Yes, this is my sole health care plan. Why? What do you have?

I like Life on Mars (ABC, 10 PM), but every time I think about it I'm haunted by an irrational fear that I'll wake up stuck in the '70s, hating all the TV but loving the pants and shoes. Oh, so conflicted!