Secret History was a long-running British television documentary series. Shown on Channel 4, the Secret History brandname was used as a banner title in the UK, but many of the individual documentaries can still be found on US cable channels without the branding. It can be seen as Channel 4's answer to the BBC's Timewatch.

An overview on the actions, hunt and capture of Ted Kaczynski, better known as the Unabomber.

理查德·迈尔斯博士探寻我们的古代珍宝，并探索我们与过去的关系。

Recently released top secret files from the early 2000's expose the lies told to the American people by senior US government in this PBS documentary, which outlines the real creators of ISIS.

In a landmark 7-part series, Spotlight - Northern Ireland’s leading team of investigative journalists - reveal important new discoveries about the conflict known as the Troubles, in the 50th anniversary of the deployment of British troops to Northern Ireland.

Archaeologists and historians use cutting-edge technology to investigate and explore some of the biggest mysteries surrounding the Underground Railroad, a secret network that helped enslaved African Americans escape to freedom.

A history of the Nazi movement in the United States. In a feature length survey of Nazism in the USA, we trace the history from the fairly benign organizations that gave structure to newly arrived German immigrants to today's neo-Nazis who breech the borderline of free-speech by using radical action to force their agenda of Aryan Purity.

第二次世界大战结束十年后，欧洲广播联盟（European Broadcasting Union）的瑞士高管马塞尔·贝桑松（Marcel Besançon）有了一个大胆的想法。他想举办一场现场泛欧歌唱比赛，以推广西欧新兴的电视服务，并通过一场共同的音乐庆典，让饱受战争蹂躏、分裂的欧洲各国更加紧密地联系在一起。第一届欧洲电视歌唱大赛……

Immigration Nation is an ambitious three part series telling the secret history of how modern multicultural Australia was forged against the odds. More than simply a social history of different migrant groups it is a dramatic political thriller based on interviews with eminent historians and the testimony of eyewitnesses - many of whom have never told their stories before - to the momentous events that built a nation. This is combined with rarely seen archive, specially shot sequences and cutting edge computer graphics applied to the actual places the events unfolded - both at home and overseas.