Dark Places (1973, Don Sharp)
Ably directed if woefully scripted chiller with the Robert Hardy and the Joan Collins and the Herbert Lom and the Christopher Lee.
Still waters run deep could be the tagline tbh.
A man "inherits" a crumbling stately pile, then takes up residence post haste. I wasn't really concentrating at this point as John Levene played an orderly, which set me off in a tangent of "is this Sgt Benton's film career I see before me??"
Ahem. Hardy's ok in the role, but I get the feeling it would have suited a younger actor cough. I had never seen this and was reasonably pleased with it. Whether I ever return to it is another matter haha. I do feel that it would have been a better film if the script had been more "in focus".