The CW’s Arrow co-executive producer Wendy Mericle would step up as co-showrunner for the show’s fourth season. Mericle became part of Team Arrow as a producer in the first season and went on to become co-executive producer. She has written several episodes of the show, including the episodes “Nanda Parabat” and “Public Enemies.” Her past credits include shows like “Desperate Housewives,” “Smallville” and “Eli Stone.”