- Hilarious in Hindsight:
- Anticipating one of Coppola's future works, Patrick Magee as Dr. Caleb looks a bit like Vito Corleone.
- Louise says of Kane "The mood around this place isn't good for her...especially an American girl. You can tell she's been raised on promises." These days, it feels like she's Waxing Lyrical and quoting the opening line of a certain Tom Petty & The Heartbreakers song. It's never been definitively established whether it was a deliberate Shout-Out or a case of cryptomnesia on Petty's part, but the similarity seems too strong to be a coincidence.
- Jerkass Woobie: John has hints of this before he dies. After he dies and we're forced to accept Louise as our main character, he becomes this.
- Moral Event Horizon: If her hiding her husband's corpse in the lake and pretending he's gone on a business trip in order not to lose the inheritance wasn't this for Louise, her plan to pretend to be Kathleen's ghost in order to gain said inheritance was. You'll most likely be cheering when Billy kills her!
- The Woobie: Billy.
YMMV / Dementia 13