Suffice to say this is typical of a eerie ,atmospheric story telling that seemed to occur quite a bit back then,also in the Night Gallery series and the ABC movie of the week,which often had this same creepy vibe to it. This tale about a doorway to something very unpleasant is very well done,and has a fine turn by Susan Dey to boot( as the big sister of the two kids who discover the door). Well worth a look( as is the whole series). I missed Sebastian Cabot presenting,he went after Ghost Story became Circle Of Fear,a shame as he added to the off kilter atmosphere.