Doomwatch

An outstanding title for a remarkable show, and I've been watching quite a bit of it lately thanks to YouTube user, DFORCE1969. The show, which originally aired from 1970-1972 on BBC 1, was the brainchild of Gerry Davis and Kit Pedler, the creators of Doctor Who's Cybermen. The focus of Doomwatch is, essentially, mad science, and it chronicles the travails of a government scientific agency charged with monitoring potential scientific and technological threats to nature and society. These duties, in turn, make the team equally unpopular with the scientific community, big business, and the very government that is funding them, so that its scientists are perpetually threatened, both physically and existentially, from all sides. Socially conscious, bleak, paranoid, and perpetually ahead of its time, the show not only made an impact on contemporary British programs (Doctor Who, Survivors) but also influenced several later series (The X-Files, Fringe).

Though several episodes are online, I've found the audio and video to be out of sync in many. I would recommend starting with these:

The Red Sky
Invasion

There's also an excellent documentary available.