The story it's based on is quite different and suggestive--while the episode holds few surprises and lacks key chemistry. Though THRILLER was generally best when doing horror and supernatural stories this one just doesn't have any twist on the shop worn material.
It's a Gothic period piece with some atmosphere --and Jerry Goldsmith score--but the story is plodding and obvious in a poor adaptation of the original story. I only read the story after being let down by the episode and feeling something must have gone wrong or been left out--then I read the original story--so I went into the show not expecting anything--just being disappointed by the lack of imagination used in adapting it and the number of clichés it employs.
The whole witches curse element in the set up is largely vacant from the source material, the other problem being that in the story the GHOST is done in a first person kind of perspective while in the episode who and what the ghost is immediately obvious and you just have to wait for the characters to catch up to you.
Human interest would be in a love story between doctor and patient but there is no chemistry between the leads and the middle part of the script is pretty dull where it introduces a bunch of characters not in the original story who then mostly vanish in the last act anyway.
The ghost effects seem to have all been done in camera--rather than in post production and this makes them pretty effective. The ending of the episode is also kind of moving--helped by Goldsmith's final music cue.
Henry Daniel is good as always in a character not in the original story--but his part works well. Boris intro has him quoting THE BARD which is fun--but the show is kind of a missed opportunity. The episode CLOSED CABINET reuses music and much of the feel of this episode to equally unimpressive results.