Not one of the better versions
Good cast, plodding script, zero atmosphere (TCATC is arguably THE 'old dark house' tale - so why on Earth have every room and hallway ridiculously brightly lit?). The acting gets it a 5/10
shareI totally agree. As you say, it's supposed to be the 'old dark house' tale, originally made as a stage play in 1922. Unfortunately, besides Olivia Hussey and Carol Lynley, the only thing I found compelling was the depiction of family tensions and tiffs with an amusing brouhaha between Charlie and (I think) Hendricks on the grand staircase.
While it gets a lot of flack, "House of the Long Shadows" is a far better example of this genre from the same general time period.