Title The Flash + Nightwing: The Doorway to Nightmare Format standard comic Binding standard comic Date January 1997 Writer(s) Mark Waid, Brian Augustyn Artist(s) Eduardo Barreto, Gerry Fernandez Collects n/a Storyline Dick and Wally drove to New Orleans on their annual vacation. After arriving, it didn't take them long to get into costume - they heard screams and went to investigate. They found two costumed girls (it was Halloween) and realized it was a false alarm. The checked out a house originally built by famed madman L.P. Gregory. He'd been found mysteriously dead four days before. Inside, they heard a familiar scream and split up to investigate. Flash found the girls they'd met earlier and a dead body - killed in the same manner as Gregory. While trying to get back to Nightwing, he realized that every door opened into (literally) another city. He was convinced aliens were involved. He caught up with his partner, who'd found blueprints of the house in the library. Gregory's friend, the caretaker of his estate, confirmed the Flash's fear - he was an alien and they were invading. The house was designed as a spawning point for them. As they began to appear, Nightwing fought them off while Flash destroyed both their spawning points and the rest of the house. They were successful destroying it and stopping the invasion.