Broadcast in the United States as "Secrets" on the Smithsonian Channel. Episodes of the U.S. version, "Secrets", aired in a slightly different order and with different titles than the Canadian and British "Treasures Decoded" versions.
A co-production of the UK's Blink Films and Canada's Pier 21 Films, in association with media distributors. The version for Smithsonian Channel in the U.S. was packaged as "Secrets", while other regions retained the "Treasures Decoded" title. Starting with the third season, the series was packaged in the UK as "Ancient Mysteries".