Delia Derbyshire and Barry Bermange - The Dreams
Intergalactic FM played a whole bunch of Italian soundtrack rough funk earlier on, and then dropped the temperature a million degrees by playing "Falling" from "The Dreams" by Delia Derbyshire and Barry Bermange.
I thought I had the lot, all the Delia Derbyshire bits floating around the ether, but it was the first time I've heard this, sounding utterly terrifying - a series of cut-up voices talking about dreams against a minimal electronic backdrop. Vaguely reminds of the also-very-scary "I before E except after C" by Yazoo.
It was broadcast in 1964 on The Third Programme (shit, great name for a band that - shame it's taken by, um, this), but no need for a time machine: the always great Mutant Sounds blog has the five tracks, complete with evocative AM radio buzz and hum.



