Doakes uses a red flashlight when breaking into Dexter's apartment. Members of the military often use a red LED flashlight when conducting night operations. This is because the human eye is less sensitive to red light, and red light minimizes pupil dilation, thus preserving night vision. This small detail stays true to the character's background.
Deb describes Lila as a gross English vampire. Jaime Murray (Lila) was a vampire in Fright Night 2 and voiced the vampiress Carmilla in the Netflix Castlevania (2017) series.