- The scene between Henrietta and her parents was originally longer and had slightly different dialogue, as seen in the promo clip.
- The first "Goth Kids" episode, "Raisins", aired in 2003. The second "Goth Kids" episode, "The Ungroundable", aired in 2008. This episode, the third "Goth Kids" episode, aired in 2013. This means each "Goth Kids" episode aired 5 years (or close to that) after the previous one.
- This episode aired a week after it was supposed to due to a power outage at South Park Studios which caused the staff to miss the deadline for delivering the episode to Comedy Central . This is the first time this has happened in the show's history. In its place, a repeat of "Scott Tenorman Must Die" was aired with live tweets accompanying it.
- The other three goths' names are finally revealed in this episode to be Michael, Pete and Firkle.
- In this episode, The Goth Kids take the main place of the boys. Michael is in place of Stan in the episode, Henrietta is Kyle, Pete is Cartman, and Firkle is Kenny.
- The boys can be seen in the distance at the end of the intro.
- This is the first time Cartman is completely absent from an episode since "More Crap".
References to Popular Culture
- The black "vamp" guy is wearing a Twilight t-shirt.
- Edgar Allan Poe is a 19th century poet and horror fiction writer. He taunts the goth kids and vamp kids for being posers and considered himself to be more goth than anyone.
- The song that is playing when Michael enters Henrietta's room after she returns from camp is "Seven" by Sunny Day Real Estate, taken from their 1994 debut album Diary.
- The head vamp kid, Vampir, quotes Lando Calrissian's line "You've got a lot of nerve coming here" when confronting Pete at the vamps meeting. This is from the 1980 film Star Wars Episode V: The Empire Strikes Back.
- Pete himself theorizes at one point in the diner that the plants are similar to the pods from Invasion of the Body Snatchers.
- The plot of plants as sentient beings, attempting to take over the world, is similar to the novel and 1962 movie The Day of the Triffids
- The "Yes, I Was Scared!" TV show is a reference to the real life TV show Scare Tactics which used the same line of "Are you scared!?" before revealing it was all a prank.
- One of the group meetings were the South Park Glee Club.
- There are multiple "emo" band posters in Henrietta's room which are parodies of real bands:
- C&C - Coheed and Cambria.
- Hacienda Heights - Hawthorne Heights.
- Bail Out Boy - Fall Out Boy.
- Zaozin - Saosin's 2006 album Saosin.
- Tommy Ate Earth - Jimmy Eat World's 2013 album Damage.
- Riot! at the Dancehall - Panic! at the Disco.
- My Medical Relationship - My Chemical Romance's 2004 album Three Cheers for Sweet Revenge.
- The poster behind the door is Sunny Day Real Estate's 1995 self titled second album which is sometimes referred to as the "Pink Album" due to its distinctive color.
- This episode marks the third time that a deceased person is summoned. The first time was in "Hell on Earth 2006" and the second time was in "Reverse Cowgirl".
- When the voice first asks if the gardener is scared, he is referred to as "Harold", but when the host of Yes, I Was Scared! asks him if he knew that the gardener job at a camp for troubled teens was a setup, he refers to the gardener as "Howard".