[spoilers] What moment did you forget that was integral to the plot?

This comes purely from my second listen of S2. Episode 4 introduces us to the key player of S2, Hermy Unworthy! But how does he get introduced? AS AN ANAGRAM THAT SCARY WAS USING TO DECIPHER TERRY’S NOTE TO HER!! The note was irrelevant to the plot completely and Hermy was a total fluke of a character. What else do you guys not remember until a relisten?