This is a bonus feature included for the TV movie "Dead of Night". Despite the similarity of the titles, the two are unrelated projects by Dan Curtis (of "Dark Shadows" fame). The TV movie is an horror anthology (perhaps originally intended as a TV pilot) and "A Darkness at Blaisedon" was a one-hour failed pilot. Both are well worth your time.
This pilot concerns folks who investigate the supernatural and in many ways it's a bit like the later "Kolchak" series. In this particular case, a young heiress is concerned because she cannot sell the mansion she just inherited because the potential buyers all complain that the place is haunted. While she doesn't believe this, she is willing to pay a paranormal researcher to investigate and give it the all clear. However, it IS haunted and soon this pretty lady finds herself possessed! What's next? See it yourself.
Overall, this is a pretty good show--and perhaps it was good enough for a 7 (it is close). It kept my interest and the only complaint is the cheap look of the production--though the "Dark Shadows" TV show also looked really, really cheap as well and probably used the same sets. Worth a peek.