Where the first two Fear Street films either used their lore as background, such as in Part One, or as context, such as in Part Two, Fear Street Part Three: 1666, which requires that mythology to be front and center, can’t manage to find anything other than a utilitarian purpose for its plot.
Transporting the same actors from the first two films into different roles for this new colonial setting, this third installment shifts the modern parlance of 1994 and 1978 to have characters talk with 17th century rhythms and cadences, in an experiment that ultimately fails just as hard as its performers do with their new accents.
The whole 1666 segment is almost unwatchable. Director Leigh Janiak and her DP Caleb Heymann shoot this entire elongated flashback like an action film, where mood doesn’t necessarily matter as much. The jerky camera (presumably to fabricate suspense) and neglectful lack of establishing landscape shots ruin any sort of mise-en-scène, and the dark, blue, day-for-night-esque filters and drab coloring never showcase this 17th century milieu.