Harper's Island is an American horror mystery limited series created by Ari Schlossberg for CBS. Schlossberg, Jeffrey Jackson Bell and Jon Turteltaub served as executive producers. The series follows a group of family and friends that travel to the titular locale for a destination wedding, only to learn that there is a killer among them. At the center of the mystery is Abby Mills (played by Elaine Cassidy), whose mother was one of several people murdered by John Wakefield seven years prior.
The series premiered on April 9, 2009, and was marketed as a thirteen-week limited event. The final two episodes aired on July 11. By the end of its run, Harper's Island averaged 9.36 million viewers, ranking #50 in Nielsen ratings. The first three episodes aired on Thursdays, but was moved to Saturdays during the week of April 28. Because of this, GlobalTV premiered the following episodes two days prior to the United States.
On July 14, 2009, CBS cancelled the series.