Subtly Becoming Harmful; a Horror Film Series

This page is the CodyCross answer for the clue below from Making a Documentary, Group 1505, Puzzle 3 (Camera Angles).

Question is: Subtly Becoming Harmful; a Horror Film Series

and the answer is: INSIDIOUS

Word Meaning:

INSIDIOUS — Causing harm in a stealthy, often gradual, manner.

Definitions from Wiktionary.

Subtly Becoming Harmful; A Horror Film Series - Making a Documentary CodyCross Answers | CodyCross Solutions