Another element that would influence future episodes came about in "Hook Man" when writers Milbauer and Burton realized that shotguns shoot salt, a weakness for spirits.
Elemen lain yang akan mempengaruhi episode-episode selanjutnya terdapat di episode "Manusia Kait", ketika penulis Milbauer dan Burton menyadari bahwa senapan menembakkan garam, sisi lemah dari arwah.