I remembered this a few months ago talking about 80s shows with friends. I looked on eBay but couldn't find it, so I tried putting the title into YouTube and the whole series is there. The memories it brought back were very fond.
The music is haunting and the production values were, for the period, very high.
The cast of each episode were drawn from the cream of British television and were, on the whole, brilliant.
Why people go on about hiding behind the sofa when Dr Who came on I will never know, for the 1980s this was the best scare on the box.