Manners and etiquette are the order of the day on PBS' Downton Abbey, that popular show about upper crust English folk and their ways. But you don't need social niceties when you're dead -- even if you're walking dead. Downton Zombie, Wade Bradford's spoof of the series, centers on the maid, Petunia, who just left Downton Abbey to work for Lord and Lady Brampton. As dinner party guests arrive, Petunia hunts down the most delicious-looking visitors instead of performing her duties, and it's up to the rest of the servants to keep her from eating everyone in sight. Chesterfield Community Theatre presents Downton Zombie at 7:30 p.m. Thursday through Saturday (October 22 through 24) a the West County Family YMCA (16464 Burkhardt Place, Chesterfield; 636-532-3100 or www.gwrymca.org). The show is recommended for ages six and older, and tickets are $5 to $8.