When Andrew is doing his final online video, there are 3 people watching his stream, one of which is using the screen name 'PTailKilla'. The Pony Tail Killer is a serial killer that has been mentioned in previous episodes and is yet to be caught
This episode revolves around the characters being obsessed with their phones. Nick's phone, Cellsea, is voiced by Chelsea Peretti who plays Gina Linetti on Brooklyn Nine-Nine who is famously addicted to her phone and everything social media.
Cellsea is voiced by Chelsea Peretti, who is Married to fellow cast member Jordan Peele.
In the Netflix trailer for the in-universe show Gordie's Journey, Gordie is watching the same nature show Nick watched at Gina's house in season 2.
Nick's phone is called "Cellsea" in this episode, in Southern Africa there is a cell phone service provider with the name "CellC".