Secrets of the Dead, produced by WNET 13 New York, is an ongoing PBS television series which began in 2000. The show generally follows an investigator or team of investigators exploring what modern science can tell viewers about some of the great mysteries of history. Most programs incorporate primary source material, first-hand accounts, dramatic reenactments, and computer-generated imagery (CGI) to tell the story. The series originated in a series of the same name in the United Kingdom first shown by Channel 4 in 1999. The first two seasons for each country were broadly similar, but thereafter diverged. The US series includes some programs shown in other Channel 4 series (e.g. Secret History). In the case of original British episodes, PBS re-edited, re-branded and finally re-narrated them with various American voice artists. PBS description: "Scientists seek to uncover celebrated mysteries of the past in this occasional British series."

Episode topics (Which are listed in different order on PBS) have included the Titanic, D-Day, the Shroud of Turin, the Salem Witch Trials, Blackbeard's lost ship, and the first English translations of the Bible.

The PBS series premiered on May 15, 2000, airing four programs in three days (the first episode, concerning the Extreme weather events of 535–536, was a two-parter). Despite an irregular schedule, new episodes continue to air.