"The Night Digger" (aka "The Road Builder") (1971) starring Patricia Neal, Pamela Brown, Nicholas Clay and Jean Anderson and written by Roald Dahl is a horror, thriller, melodrama about a daughter caring for her elderly mother in a decaying mansion who are joined by a young stranger on a motorcycle.
Maura Prince (Neal) is an aging woman who is stuck in a life caring for her elderly and blind mother, Edith Prince (Brown). They live in an old mansion in the English countryside that according to Maura is 'going to pot'. Maura has been offered a full time job at the hospital where she volunteers but her mother is a master manipulator who gets her to remain at home with her.
"The Night Digger" is an excellent psychological love story filled with eerie Gothic atmosphere. Patricia Neal is superb as the long suffering daughter of an overwhelming mother, who just wants to break out and live her own life before it's too late. The action is rather slow but the decaying mansion and estate as well as the talented cast of characters and the situations they encounter, make this gem of a film very enjoyable to watch.