Uploaded September 2026 | Updated September 2026, 3 weeks ago
As the country reels in the aftermath of 9/11, an entirely new threat spread across the nation. Deadly anthrax spores sent through the mail kill five people and spread authorities thin. See more in this scene from Season 4, Episode 19, "The Hunt for the Anthrax Killer."
Watch all new episodes of History's Greatest Mysteries on Mondays at 9/8c, and stay up to date on all of your favorite The HISTORY Channel shows at history.com/schedule.
#HistorysGreatestMysteries
Subscribe for more from History's Greatest Mysteries and other great The HISTORY Channel shows:
histv.co/SubscribeHistoryYT
Find out more about the series and watch full episodes on our site:
histv.co/HistorysGreatestMysteries
Check out exclusive The HISTORY Channel content:
History Newsletter - history.com/newsletter
Website - history.com
Facebook - facebook.com/History
Instagram - instagram.com/history
TikTok - tiktok.com/@history
The HISTORY® Channel is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming. History’s Greatest Mysteries is a one-hour documentary series that examines the top theories surrounding the world’s most enigmatic unsolved mysteries. Hosted and narrated by Academy Award® nominee and Emmy Award® winner Laurence Fishburne, each episode unpacks these puzzles with contributions from top historians, authors, scientists, and researchers. From unsolved crimes to lost and buried treasures, and the deaths and disappearances of famous figures, History’s Greatest Mysteries will explore possible explanations to some of the world’s most confounding events.
HISTORY® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming.
As the country reels in the aftermath of 9/11, an entirely new threat spread across the nation. Deadly anthrax spores sent through the mail kill five people and spread authorities thin. See more in this scene from Season 4, Episode 19, "The Hunt for the Anthrax Killer."
Watch all new episodes of History's Greatest Mysteries on Mondays at 9/8c, and stay up to date on all of your favorite The HISTORY Channel shows at history.com/schedule.
#HistorysGreatestMysteries
Subscribe for more from History's Greatest Mysteries and other great The HISTORY Channel shows:
histv.co/SubscribeHistoryYT
Find out more about the series and watch full episodes on our site:
histv.co/HistorysGreatestMysteries
Check out exclusive The HISTORY Channel content:
History Newsletter - history.com/newsletter
Website - history.com
Facebook - facebook.com/History
Instagram - instagram.com/history
TikTok - tiktok.com/@history
The HISTORY® Channel is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming. History’s Greatest Mysteries is a one-hour documentary series that examines the top theories surrounding the world’s most enigmatic unsolved mysteries. Hosted and narrated by Academy Award® nominee and Emmy Award® winner Laurence Fishburne, each episode unpacks these puzzles with contributions from top historians, authors, scientists, and researchers. From unsolved crimes to lost and buried treasures, and the deaths and disappearances of famous figures, History’s Greatest Mysteries will explore possible explanations to some of the world’s most confounding events.
HISTORY® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming.
