Signed, Sealed, Delivered, also known as Lost Letter Mysteries, is a drama/romantic comedy television series that aired on the Hallmark Channel in 2014 from April 20 through June 22. Created by Touched by an Angel's Martha Williamson, Signed, Sealed, Delivered focuses on four dedicated United States Postal Service employees who work in the dead letter office. They take it upon themselves to track down intended recipients of undeliverable mail. Similarly to her previous program, the show promotes Williamson's Christian beliefs through the faith of the characters. It is set in Denver, Colorado but filmed mostly in the Vancouver area. On October 12, 2013, a two-hour pilot movie aired on Hallmark and was a ratings success. It was the number-one television movie on its airdate and the number-two movie for that week. The movie was watched by 1.72 million viewers. Following one season of the TV series, Hallmark announced Signed, Sealed, Delivered would transition to a series of television films on its Hallmark Mystery channel.