4KHDRDolby Atmos
•TV-MA•4 Seasons•7.5History's Secrets
Mysterious events, compelling figures, and great unanswered questions from the past are explored in this National Geographic series.
Episodes
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Information
Studio
Cinema Premiere
Genre
Original Release
N/A
Video Format
4K UHD • HDR10 • Dolby Vision
Audio
Dolby Atmos, 5.1, Stereo
Accessibility
Closed Captions (CC), Audio Description (AD)
Community Rating
7.5 / 10
Content Advisory
TV-MA (16+)
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