Visitor Sighting: During the end scene where Cartman is standing in the planetarium and his mom enters and says "don't pick your nose hun". There is a small half transparent figure to the left of the screen. this figure is an alien from the first episode. Its eyes are lights that are slanted down on an angle. It is obvious that Matt and Trey put it in as it does not fit to the background.
Just to clear up this Plane'arium thing once and for all: Dr Adams does not pronounce Planetarium correctly just before Cartman kills him; however, he does pronounce it correctly TWICE about 10 minutes into the episode.
The red headed kid (Peter) messes up the last verse of Bingo
The music at the end of Barnaby Jones is the same as the music that plays at the end of the Chicken Lover episode when Barbrady gives the thumbs up
A female judge for the cheesy poof contest says "that's odd" in a male voice.
Cartman: I could sing the cheesy poof song with both hands tied behind my back!
Kyle: You couldn't get both hands behind your back, fatty!
Cartman: But Mr. Garrison, I have to go and sing the Cheesy Poofs song!
Mr. Garrison: No Eric, you have to come in the Planetarium and look at a bunch of stupid stars.
Kyle: Fat ass Cartman was not on the school bus today, what a big fat turd.
Cartman: Why hello. If it isn't my little friends with all their little dreams.
Mr. Garrison: Now what's wrong with the Planetarium?
Stan: It's boring.
Kyle: Yeah, all the constellations look alike.
Mr. Garrison: Well too bad. You're all going to the planetarium tomorrow and you're all going to love it.
Dr. Adams: Hi, I'm Dr. Adams, and welcome to the Plane'arium.
Stan: I thought this was the planetarium.
Dr. Adams: It is, I have a bone disease that prevents me from saying the 't' in Plane'arium.
Cartman: Hey, they're giving out bread outside!
Poor girl: Finally we can get something to eat.
(when the poor girl and her mom walk outside, Cartman shuts the door)
Mrs. Cartman: Hon, don't pick your nose.
Cartman: God dammit, I'm not picking it. I have an itch for crying out loud.
Dr. Adams: Now stars are actually made of hot gas, which is exactly what comes out of Roger Ebert's ass.
Man Singing: I love Cheesy Poofs. You love Cheesy Poofs. If we didn't love Cheesy Poofs, we'd all be...
(After Kenny's head explodes)
Stan: Oh my God! We've killed Kenny!
Kyle: We're bastards!
Nurse Gollum: This is the strangest thing I've ever seen.
Mr. Mackey: Please, Nurse, for a woman with a dead fetus on her head you're not being very open-minded.
Mr. Garrison: A haiku is just like a normal American poem except it doesn't rhyme and it's totally stupid.
(during planetarium show)
Principal Victoria : Oh man this is boring.
Some guy: Yeah, who finds this stuff interesting?
High teenager 1: Dude, this is totally killer.
High teenager 2: I hope this goes on for like…7 months.
Mr. Garrison: Ok children, now I'm going to remind you that this is a planetarium, not a Bangkok brothel, so let's behave ourselves.
Kyle's 2nd Haiku: Ass full of pork fat, jiggles like a jello-mold, mouth is flapping too.
There is no Barnaby Jones episode titled "Barnaby Under Seige."
This is the first time Cartman saves the day (albeit unintentionally).
This is the only time Mr.Mackey says "Drugs are GOOD"!
The two stoner kids return in this episode. They were first seen in the episode "Ike's Wee Wee," and they turn up in this episode to watch "Laser Loggins" at the planetarium.
This is the first episode that we hear Butters speak.
Cartman's grandma is seen for the first time in this episode.
In this episode we learn that Cartman's full name is Eric Theodore Cartman.
On the DVD Matt & Trey intro the show with the "Makin Bacon With Macon."
Matt & Trey also point out that this episode is a parody of the Star Trek: TOS Episode "Dagger of the Mind"
The Latin phrase in the planetarium: "Me transmitte sursum, Caledoni!" which means "Bring me up, Scotsman" or what they really intended it to mean "Beam me up, Scotty".
In the final shot of the episode, of Cartman, in the left-hand side of the picture the out-line of one of the alien visitors can be seen hidden amongst the planetarium lights.
Cartman: I'm talking Night Court in its fifth season lame!
Night Court was a situation comedy aired on NBC from the mid 80s to through the early 90s.
Kyle: Can you…imagine it, Stan? A mind…emptied…by that thing.
Kyle's closing piece of dialogue is a reference to William Shatner's manner of speech.
Star Trek: This whole episode is an allusion to the classic Star Trek episode "Dagger of the Mind," and if you watch the ST episode first, this episode is even more hilarious. The most notable references are the laser in the planetarium and the child named Van Gelder, named after the first victim in the Star Trek episode.