The Atlas Performing Arts Center, haunting the H Street Corridor, is screening creepy classic films all day on Halloween Sunday, Oct. 31, starting at 2 p.m. with Agnes Moorehead (Endora from Bewitched) in The Bat. It's followed at 3:30 p.m. by the Vincent Price classic, House on Haunted Hill and the original (non-musical) Little Shop of Horrors, about a man-eating plant, directed by Roger Corman and featuring Jack Nicholson as the dentist's patient at 5 p.m. Things wrap up with the camp classic The Brain That Wouldn't Die at 6:30 p.m. Atlas Performing Arts Center, 1333 H St. NE. Tickets are $5 to each film, or $10 for a Halloween 4 Four Film Package. Call 202-399-7993 or visit atlasarts.org.