In the episode, Lois and Stewie come out of the TV in goo, but in the real movie "Poltergiest" when Carol Ann and her Mom come out they are covered in blood.
When Lois and Stewie escape the spirit world, via Meg, they were covered in a pinkish kind of goo. However, when they ran out of the house and into the car, the goo was gone.
When Lois goes in looking for Stewie, Peter ties a rope around her so they don't lose her, but when she finds Stewie and they exit out of Meg's ass, Lois has no rope around her.
Several bits of Jerry Goldsmith's original score for "Poltergeist" are used in this episode and match up to where the piece was used in the original film, i.e., when Stewie gets out of his crib to go to the TV and the whispering scene between Lois and the medium. The music in the closing credits of this episode is an obvious parody of Goldsmith's "Carol Anne's Theme", a similar piece of music that runs over the closing credits of "Poltergeist".
The author of "A Guild to the Occult" is Beverly Cleary. Cleary is the same author of the Ramona Quimby, Henry Huggins, and Ralph S. Mouse book series.
Lois: Stewie! Head for Meg's butt!
Stewie: Have you lost your mind?!
Stewie: (Through the TV) Mommy?
Lois: Stewie? Where are you?
Stewie: Look behind you, you stupid cow!
Brian: You know, we wouldn't be messing around with ghosts if you hadn't desecrated an Indian's remains.
Peter: Probably not a good time to mention I'm using the skull as an athletic cup.
Peter: I'll tell you what isn't safe: going hunting with Dick Cheney. (In flashback about hunting with Dick Cheney.) We all set to go hunting?
Dick Cheney: (Shoot Peter several times with a shotgun) Sorry, I thought you were a deer.
Mayor Adam West: I just bought a Rottweiler, and I need a sign to warn people how dangerous it is.
Home Supply clerk: (Pointing to BEWARE OF DOG sign)... Well, we have exactly what you--
Mayor Adam West: Ah, yes, here it is...(Motions to One Way sign)... So people will know if they step into my yard, there's only one way out--in a body bag from dog injuries.
Peter: We're gonna get those terrorists. Now, watch this drive. (Swings and hits golf ball through portal)
Brian: So what was it like on the other side?
Stewie: It was alright. I met Jesus.
Brian: Oh, what's he like?
Stewie: Believe it or not he's Chinese.
Brian: Oh, really.
Stewie: Yeah, and his last name is Hong, Jesus Hong. He said he doesn't know where everyone got Christ.
Lois: Oh, Peter, I'm so proud of you. Once again you've brought our family to the edge of the abyss and at the very last minute you saved us all. I love you, honey.
Peter: And I've grown fond of you, Lois. Let's go home.
Stewie: (as he is being sucked into the spirit portal through his closet) Ahh, I haven't seen anything suck this bad since... I Heart Huckabee's!
Peter: Between you and me I hear Joe's got a little free time these days. I hear he hasn't touched Bonnie in months
Joe: Peter, you just whispered that to me.
Tom: A local family is forced out of their home by ghosts. Who they're gonna call?
Diane: (Sighs) Ghostbusters, Tom?
Tom: No, Diane, their insurance company. That's just stupid what you said.
Peter: Lois, we both agreed, remember? If we could only save two, we would leave Meg.
Lois: Peter, are you peeing in that skull?
Peter: No Lois! I'm getting up and walking all the way to the bathroom and doing it there...Pain in the ass.
Gay Mailbox: Hello, Hello! Right here! Yeah, just right here, just go ahead and put that right in here.
(Mailman puts mail in mailbox)
Gay Mailbox: Num-Num-Num-Num-Num...Gulp! Heheh, just kidding!
Quagmire: As you can see, my family is here and it's game night. We're playing ... sex.
Herbert: (to the tree about Chris) Hey there, skinny britches. That's my man!
Stewie: Yeah, yeah, Oh they're doing a spin-off. He still plays Joey, but...um...it's not doing that well.
(Stewie is talking to a TV full of static)
Stewie: Yeah, Yeah, Oh you didn't see it? Ross and Rachel got back together, it wasn't that great.
Peter: We're gonna get those terrorists. Now, watch this drive.
President George W. Bush had a run in with the press in August 2002 while he was golfing. He issued this statement:
"I call upon all nations to do everything they can to stop these terrorist killers. Thank you. Now watch this drive."
I <3 Huckabees
Stewie: I haven't seen anything suck this much since (yelling) I <3 Huckabees
I <3 Huckabees is a movie with Dustin Hoffman and Jude Law. Determined to solve the coincidence of seeing the same conspicuous stranger three times in a day, Albert hires a pair of existentialist detectives, who insist on spying on his everyday life while sharing their views on life and the nature of the universe.
Chief Diamond Phillips
Peter names the discovered indian skull "Chief Diamond Phillips", which is a reference to native American actor Lou Diamond Phillips.
The end scene alludes to the closing scene from The Flintstones with Peter taking the television back inside and replacing it with Meg, as Fred did with Dino.
Phil Collins - In the Air Tonight
When Stewie is speaking through the television set on "the other side", he starts to sing the hit song, In the Air Tonight by solo artist and former member of Genesis, Phil Collins. He makes use of the unique vocal effects which sound exactly like the song's beginning and even attempts to emulate the drumming sounds from the song.
The Man with the Golden Gun
The scene where Peter and Carrot Top are in the hall of mirrors is a parody of the James Bond movie, The Man with the Golden Gun, when Bond was in a similar situation when he faced Scaramanga.
The scene where Chris is in bed and says, "I wish that scary clown at the end of my bed would go away." is poking fun at Ronald McDonald.
It is also a reference to the movie It, based on a book by Stephen King, in which the 'monster' appears as a clown.
The scene where Herbert is fighting the tree, aludes to the opening sequence in "The Lord Of The Rings: The Two Towers", and in "The Lord of the Rings: The Fellowship of the Ring" where Gandalf fights the Balrog (the fire Demon in the Mines Of Moria).
After the poltergeist invades Peter's house and Peter is shown ripping his face off, the head underneath all of his skin is none other than that of the character Hank Hill, the main character of King of the Hill. Peter also does his trademark laugh and says, "Propane."
Peter mentions the successful ABC mystery TV series Lost. The series' innovating plot makes it more complex than other series and viewers can get "lost" with everything that is happening in the story.
The old guys in the balcony are a reference to the Muppet Show and are named "Stadler" and "Waldorf". The two old guys would make comments of the various sketches and generally be negative.
Joe's theater logo/opening is a reference to the Tri-Star opening. In the Tri-Star logo a white horse runs from the left background and runs towards the camera. It then sprouts wings and turns into Pegasus and flies over the Tri-Star triangle logo. In Joe's version it is him in his wheelchair replacing the horse.
When Peter says: "must have taken a wrong turn at Albuquerque." It's a reference to The Looney Tunes Cartoons where Bugs Bunny would always land miles from his planned destination usually by misdirecting himself at Albuquerque, New Mexico.
When Stewie beats the hell out of Peter it is almost a direct scene out of the MTV program, Jackass, when Bam Margera beats up his overweight father, Phil. In addition, the name shown in the corner of the screen says, "Stew-O" which is a parody of the name of another cast member, Steve-O.
When Stewie says Ross and Rachel got back together he is referring to the show Friends.
Home Supply is an obvious jab at Home Depot
The title, and most of the scenes in the episode are all references to the film Poltergeist.