Chucky says to Jake that he has a "queer kid" he's referring to Glen/Glenda from Seed of Chucky (2004). when asked at the Chucky panel at New York Comic Con 2021 whether or not the character would be making an appearance in the series, series creator Don Mancini's only answer was a cheeky "keep watching."
Two years before the series premiered, Sanrio once made a collaboration with the Child's Play franchise by releasing official Hello Kitty X Child's Play merchandise exclusively to Universal Studios Japan, with Hello Kitty as Chucky, Tiffany, and their son/daughter Glen. In this episode Chucky is seen wearing a Hello Kitty mask as he's "trick or treating" and giving a lady a green apple filled with a razor as a treat.
Don Mancini cameos as the Uber driver that ferries Junior to the Halloween party.
Chucky says to Caroline that her mother is working her way up on his kill list, this is a call back to Seed of Chucky (2004) where he mentions that he killed Tiffany's mother.
Logan (also Devon Sawa) and Bree (Lexa Doig) discussed whether they were capable of looking after somebody as troubled and traumatized as Jake. The conversation was all-but identical to one Andy Barclay's foster parents had when taking him in at the start of Child's Play 2.