I found out about this movie after reading Night Gallery: An After Hours Tour (which I highly recommend). Dark Intruder was the pilot for a potential series for television called The Black Cloak, produced by Jack Laird. Dailymotion is currently offering a slightly blurry copy for view, and it's well worth the time spent.
Here's the pressbook to whet your appetite. Bon appetite.
See more movie pressbooks From Zombos' Closet.