ABC Cynthia McFadden Watches Cynthia McFadden By Chris Ariens on May. 3, 2012 - 12:29 PM As she was preparing to anchor “Nightline” last night and writing her script for a story on this morning’s “Good Morning America,” Cynthia McFadden kept her office TV on ABC, and caught herself in a cameo on the new ABC show “Revenge.”