Shadows

I can vaguely remember the TV series 'Shadows' from the seventies, in particular the episode entitled 'The Other Window', which gave me nightmares for a week or two when I was an impressionable eight year old. I seem to think the window of the title was circular and when one looked through it, one saw strange and often scary things happening. I cannot remember the other episodes of this series, although if anyone can recall the plot lines of any of them it may well help to jog my memory. I think it aired on the BBC, but I don't ever remember it being repeated. I would love to know if this series is available either on video or DVD. Does anyone else remember this one?