Are there intelligent beings in other parts of the universe? Twenty years ago, radio telescopes gave us the means to receive, and make, galactic telephone calls. So far, no one has called us - and no one answers when we call.

But most scientists are convinced they are there. From present knowledge of 'life, the universe, and everything' they estimate that the galaxy is positively swarming with life. So where is everybody?

"A slice of stargazy pie-in-the-sky every bit as perky as its title." (The Guardian)
"Compulsive" (Time Out)

A Horizon production
(First shown on BBC2)