Key to the Missing is a documentary TV series that aired on the DuMont Television Network from July 4, 1948, to September 23, 1949.
Techniques used included displaying pictures and samples of handwriting of missing people and interviewing their relatives and friends.
Viewers who had insights into where any of the missing people might be were asked to call with relevant information.
[4] A review of the June 27, 1948, episode in the trade publication Billboard noted a "phony and completely unnecessary build-up" to one segment of the program, and it summarized, "Production was poor, pace non-existent.
This article relating to a non-fiction television series in the United States is a stub.