自1983年开始播映的PBS新闻最前线节目。

20世纪90年代中期美国海军研究所已经开发出躲避网络地址追踪的技术。这种技术可以随时改变网络登陆地址。美国海军2004年对外公开了这种技术，任何人都可以使用。美国国防部20世纪60年代主导建立了互联网。 “You're Being Watched”，正如美剧《疑犯追踪》的片首宣称的一样，在互联网诞生25年之后，事关它存亡的最大争议出现了：监视。在人们担心政府和企业现在可以监控我们的一举一动的情况下，《地平线》节目组出发会见了那些正在利用科技反戈一击的黑客和科学家们。这是一项极具争议的技术，一些执法部门的官员相信这正使得“无风险犯罪”在“暗网”上盛行——在这里，从枪支、毒品、到信用卡账号信息，几乎所有的东西都可以被购买到。通过与互联网的发明者、蒂莫西·约翰·“蒂姆”·伯纳斯-李爵士和“维基解密”网站的共同创始人、朱利安·阿桑奇的访谈，《地平线》带你深入“暗网”内部。

Twenty-five years after the world wide web was created, it is now caught in the greatest controversy of its existence: surveillance.
With many concerned that governments and corporations can monitor our every move, Horizon meets the hackers and scientists whose technology is fighting back. It is a controversial technology, and some law enforcement officers believe it is leading to 'risk-free crime' on the 'dark web' - a place where almost anything can be bought, from guns and drugs to credit card details.
Featuring interviews with the inventor of the world wide web, Sir Tim Berners-Lee, and the co-founder of WikiLeaks, Julian Assange, Horizon delves inside the 'dark web'

A documentary feature film about the biggest global corruption scandal in history, and the hundreds of journalists who risked their lives to break the story.