October 31: Artemis and Zatanna go to Manhattan for a girls' night after learning that Superboy and Miss Martian are a couple. While out, they encounter a dangerous psychopath named Harm who is hiding a deadly Secret (comics) Secret. Meanwhile, Wally West, Megan Morse, and Conner Kent attend a Halloween party at Megan's and Conner's school. Also, Megan introduces Wally to Wendy, Marvin, Karen Beecher and Mal Duncan. There, they thwart the efforts of Marvin (who was playing a Halloween prank on the students) by playing a prank on him.