As the episode starts and you see Billy watching television listen carefully. You will hear Hector talking from the Evil Con Carne episode "Gridlocked and Loaded".
When Billy is recounting his childhood to the therapist, during the flashback scene Billy's dad is shown reading a newspaper named "Endville Gazette". The town is called Endsville, not Endville.
Near the end of Wishbones, Grim uses the last wish to wish that Billy and Mandy never found the wish-granting skull, but in The Show that Dare Not Speaks Its Name, Billy mentions the skull which he should have no memory of.
(Lord Pain is showing Billy what is happening at his house, where neighbors are complaining about Billy)
Man: Bring us the boy! Hand him over!
Skarr: He broke my garden!
Woman: He broke my bus!
Lord Pain: Your father refused to give you up.
Gladys: (as Harold prepares to throw her into the angry mob) No, Harold! (angry mob starts beating up Gladys) Sorry, angry mob! Harold always gets like this during football season!
Billy: Bend over and let me ride your humps!
Grim: I can't. I have to meet someone on the Internet who paid big bucks for this embarrassing photo I took of your dad. (holds up a picture of Harold) So you're just gonna have to play by yourself till I get back.
Billy: Can I--
Grim: (interrupting) No! You can't go digging in my magical trunk for something to play with.
Billy: Then can I--
Grim: Hold on.
(Grim creates a door)
Grim: I told you to keep your hands off of the junk in my trunk!
Billy: Mandy, what happened to Grim?
Mandy: I don't know, Billy. But I know he's in a better place.
(Grim is then seen with Pinface's sister in the Netherworld)
Grim: (to Pinface's sister) Will you let go of me, woman? I'm not going antiquing with you people!
Billy: (Looks at bowl of oatmeal) This isn't pancakes! (throws bowl out window, bowl explodes)
Billy's Dad: (shouting) Billy! Are you nuts or just crazy?!
Billy: Is that a trick question?
Lord Pain: (to Billy) What do you say we wreck the place!
This marks the first time in the show where Billy is refered to as Mandy's "boyfriend".
The Show That Dare Not Speak Its Name has been billed in TV listings as Cubix Rube.
The Plain of Eternal Suffering has been renamed Level 9.
Main Villain Bio: Pinface - A demon from the Netherworld who Billy released from a rubix cube in Grim's trunk. When Pinface and Grim were kids, they used to live across the street from each other until Pinface's dad got another job. Grim enjoyed hanging out with Pinface's sister, but he dumped her because of the bowling pins sticking out of her face.
Running Gag: Billy goes around and breaks things.
This is the second appearance of Billy as a baby, yet this time, he looks different.
Main Villain(s): Pinface
During The Show That Dare Not Speak Its Name, in a fit of boredom, Billy turns the television to "The X-Treme Adventures of Brandon and Mallory" before smashing the set. This show was first introduced in the episode Hurter Monkey.
At the beginning of The Show that Dare Not Speak Its Name, Billy was watching Evil Con Carne.
The Show that Dare Not Speak Its Name was formerly called Cubix Rube.
Second appearance of Lord Pain.
He is a reference to Hellraiser, who has white skin and acupuncture pins sticking out of his head.
Pinface: Can you hear me now? (later) How about now? Good.
This is a reference to the old Verizon commericals where a man went around saying "Can you hear me now? Good."
Grim: I told you to keep your hands off the junk in my trunk!
This, and a line Billy said prior to it ("Let me ride your humps!"), might be a reference to the popular Black Eyed Peas song "My Humps."
The Sprint Commercials
When Pinface popped up in places with a cell phone saying "Can you hear me, now?" almost like the Sprint commercials on TV.
When looking in the mirror, Billy's princess outfit is similar to the Princess Peach's from "Super Mario" games.
Pinface: Great Googly Moogly!
This is the catchphrase used by The Ferocious Beast on the imaginative children's series Maggie and the Ferocious Beast.
He is a reference to the cenobite Pinhead from the Hellraiser horror movies based upon Clive Barker's novels, and the rubix cube puzzle cube is a parody of the Puzzle Box which opens the gateway to the Netherworld.
You can see three monsters slam cans against their heads. This was done in the movie "Animal House".
Goodvibes: Sweet Mother-of-Pearl!
This is Mr. Krabs' favorite catchphrase from Spongebob Squarepants.