Fridge Horror/Fridge Logic: Peyton isn't able to make Claire think Solomon's molesting Emma just because it's every parent's worst nightmare. It's also because what Dr. Mott did to her has made her extra paranoid. Which raises the icky possibility that she knew all along what kind of a sicko she was married to, but chose to turn a blind eye.
Harsher in Hindsight: Seeing Claire being molested/taken advantage of by a more powerful man with an elevated status looks much worse since twenty-five years later, Annabella Sciorra would publicly accuse Hollywood executive Harvey Weinstein of sexual harassment/assault. Also, like with Claire/Annabella, several other women have come forward with accusations as well.
Peyton going into premature labor, which is a mixture of this and Tear Jerker.
Anytime Claire's asthma flares up, particularly after she discovers Marlene's body, which got so bad, especially since Peyton cut her inhaler so she would suffocate without it, she had to be hospitalized and put on a respirator. More disturbing, the death trap was meant for her.
Rooting for the Empire: A lot of viewers can't help but root for Peyton, mainly due to De Mornay's excellent and charismatic performance compared to the rather bland protagonists.
Tear Jerker: At one point, Solomon says that one thing he really wants is a blue bicycle, and the family give it to him to show that they consider him very much a part of the family. While this is quite sweet, it becomes absolutely heartbreaking when Peyton accuses him of and frames him for sexually abusing Emma... and we see a shot of Solomon just looking hurt and confused as his bike is taken away from him.