My local TV schedule shows the running time for "House of Dark Shadows" at 105 minutes. It also shows 105 minutes for "Night of Dark Shadows." Could it be that TCM will be showing restored versions of these films?
It seems to me that when the two DS movies aired in the past, it was on AMC, not TCM, but I may be mistaken about that.
Maybe we should all tape the movies -- just in case they've come up with extended versions! The movie channels sometimes come up with some surprises -- witness the recent airing of "Frankenstein: The True Story" on AMC instead of the advertised Dan Curtis version -- this three-hour version co-scripted by Christopher Isherwood is not only one of the highest rated versions of Frankenstein, but scores of people had been dying to see the complete, uncut 300-minute version ever since it first aired in the early 1970s -- only a savagely cut version was ever released on video (like, 45 minutes worth of cuts). So the surprise came somewhat at the expesne of those wanting to see the Dan Curtis version, but as a long-awaited moment for many others who had all but given up hope of ever seeing the extended version of this made-for-TV film. Personally, I didn't find "Frankenstein: The True Story" to relate all that much to the Mary Shelley novel, but the cast (James Mason, Agnes Moorhead, Leonard Whiting, Michael Sarrazin, Sir Ralph Richardson, et al.) and production values definitely made this rare showing an event.
Maybe we'll be similarly surprised with the upcoming airings of HODS and NODS!