Entertainment Weekly has a write-up on all the Halloween episodes airing for the next two weeks (yes TWO weeks... some are airing AFTER Halloween!) and there's quite a few of them.
Everything "network broadcast" is covered from ABC's Modern Family to CBS's Criminal Minds to NBC's The Office. I believe the last to air on November 7th is American Dad's episode so there's your "season closer."
Check out the whole list on EW.com HERE. BEWARE! There be spoilers in them descriptions!