*Regular Cover
**In the bottom left, the sigil is for summoning the demon Abyss, Lord of Chaos.
**In the bottom left is the Hraethigaldur rune used to cause fear in an enemy.
***The rune previously appeared on the white board on page 16 of Ghostbusters International #10
**In the bottom left, Beelzebub is referenced. He is one of the seven princes of Hell and Lord of the Flies.
**In the bottom right, Luke Sifler is referenced. He was the principal villain in the unproduced Ghostbusters movie, Hell Bent.
**In the bottom center, Manhellton is referenced. It was a location in the unproduced Ghostbusters movie, Hell Bent.
**In the bottom center, Boo York is referenced. It was an alternate New York populated with ghosts featured in The Real Ghostbusters episode "Flip Side"
**The hellish landscape is an homage to the concept in the unproduced Ghostbusters movie, Hell Bent.
**The silhouette of the Devil under the Ghostbusters title is visually based on Xanthador, the principle villain in the novel, Ghostbusters: The Return
**Erik Burnham rewrite the script after he saw the cover.
*Subscription Cover
**Melanie Ortiz appears on the cover at the gates of the Fairlawn Mansion.
*Credits Page
**The image re-used is from page 8, panel 6 of this issue
*What Came Before! Page
**The recap mentions when Loftur dispersed Egon at the end of Issue #7
**The first image is re-used from Ghostbusters International #10, page 13, panel 2
**The Ghostbusters Get Real mini series is mentioned.
**The second image is re-used from Ghostbusters International #10, page 4, panel 1
**The recap heavily summarizes the events of Issues #8 to #10
*Page 1
**The issue opens at the Central Park entrance at Warner LeRoy Place and Central Park West near W 67th Street.
**In panel 1, Ecto-1 is on the right obscured by the police car.
**In panel 2, Mike appears to be 'Restaurant Cop No.1' from Armand's in Ghostbusters II
***Previously, the Hot Dog Vendor from the first movie was named Mitch in Volume 1 Issue #14
**In panel 2, once more, Jenny is wearing her Ghost Smashers flight suit.
**In panel 2, Jenny alludes to PCOC.
**In panel 3, Luis Delgado's 15 easter egg appears on the speed limit sign as 15 miles per hour.
***The speed limit in reality is 20 miles per hour.
**In panel 3, the license plate of the police car is "1984" - a nod to the first movie's release.
**Introduced at the end of last issue, Umpire Rock is a protrusion of exposed bedrock located on the West Side at 63rd Street just south of the Hecksher Ballfields.
**Loftur comments they are right on time. Last issue, he issued the midnight meet time to Ray.
*Page 2
**Like in Ghostbusters II, Ray and Winston are wearing the Slime Blowers.
**Melanie is packing the Proton Pistol, originally used by Winston starting in Ghostbusters: Infestation. It was last used in Annual 2015 by Winston in the dream state.
**Once again, Egon from The Real Ghostbusters has the Destabilizer from The Real Ghostbusters episode "Egon's Ghost"
**Janine is wearing the Compact Pack. She last used it in Teenage Mutant Ninja Turtles/Ghostbusters Issue #4.
**Loftur culled Erland Vinter's body last issue.
**Loftur is holding his Ley Lines book from last issue, a nod to the book from the 2016 movie.
**In panel 5, in the background behind Loftur is the Hampshire House at 150 Central Park South.
*Page 3
**In panel 2, the rune Loftur casts is the Ægishjálmur (or Helm of Awe) - said to protect against abuse of power or induce fear
***Loftur's first appearance in Ghostbusters International #5 was in a panel with the Helm of Awe rune
**In panel 3, Jenny uses the page from the Rauoskinna she almost read on page 17 of Ghostbusters International #10
**In panel 5, part of the Tavern on the Green can be seen.
***In Volume 2 Issue #1, Peter and Melanie were on their way to the Tavern, renamed the Ritz Cafe after a recurring location in the Slimer! animated series.
*Page 4
**Peter calls Loftur "Snorri" after Snorri Sturluson, author of the prose "Edda"
**Loftur remarks the veil to beyond is thinnest in Central Park. This was previously experienced in the finales of Ghostbusters: The Video Game and Ghostbusters: Displaced Aggression, IDW's second mini-series.
*Page 5
**Peter jokes they're in New Jersey and they just need to catch the 495, the highway from New Jersey to New York.
**As in Volume 2 #9, Winston's faith and cross protected him from the Devil. His absence here is likely related.
*Page 6
**In panel 3, the Devil's form is visually inspired by Xanthador from Ghostbusters: The Return
*Page 8
**In panel 3, on right side of the contract is the Satan Cross, a double cross above the infinity symbol.
*Page 9
**Ray mentions Dante and Virgil, the principal characters of "Dante's Inferno" where Hell was said to be located underneath Jerusalem and described as a funnel that extended all the way to the center of the Earth.
*Page 10
**The Devil's human form is based on ? Brad Pitt from "Meet Joe Black"?
**The Devil mentions Stingy Jack and the encounter from Volume 2 Issue #9
*Page 11
**Ray brings up the Ghostbusters' escape from the Collector's domain in Volume 2 Issue #3
**Kylie points out the River Styx. In "Dante's Inferno," it was located in the 5th Circle.
**In panel 4, the tour guide and boat from The Real Ghostbusters episode "Knock, Knock" makes a non-canon cameo.
*Page 12
**The giant demon is a depiction of Lucifer. In "Dante's Inferno," it was believed
***Lucifer crashed headfirst into Earth after his rebellion in Heaven failed and he became stuck at the bottom of Hell.
***Cocytus turned into a perpetual frozen lake thanks to his flapping wings.
***He is depicted with three faces, each chewing on a sinner. Judas was chewed by the middle head and Brutus and Cassius, killers of Julius Caesar, were in the side mouths heads hanging out.
***There are four types of sinners in the lake.
****The Caina or traitors to kin are submerged heads down.
****The Ptolomea or traitors to guests have their heads over the ice
****The Giudecca or traitors to benefactors are completely immersed in the ice
****The Anetora or traitors to homeland are constantly gnawing on other heads in the ice
*Page 13
**"The Divine Comedy" is directly referenced.
**Dante and Virgil go through the Earth's center in Canto XXXIV just as Ray instructs Peter to grab a tuft of fur and climb down to the center of the earth.
*Page 14
**Kylie and Peter went to Craig Liath in Ghostbusters International #7.
**Aibell refers to the favor Peter agreed to at the end of Ghostbusters International #7 so Una O'Neill could pass on.
**Kylie refers to when she tried to warn Peter against making the deal with Aibell.
*Page 15
**Egon was dispersed in Ghostbusters International #7. He is returned wearing the same gray vest outfit from the first movie he was wearing and the Psychokinetic Defibrillator.
**Egon mentions his apartment.
*Page 18
**Winston was similarly left behind when other Ghostbusters went on an interdimensional trip in the Checking Out The Library level of Ghostbusters: The Video Game.
*Page 19
**Peter alludes to the Fort Detmerring Ghost from the first movie; the ghost of a blonde woman.
**Kylie's disgust is a nod to the infamous blowjob the ghost gives Ray.
*Page 20
**In panel 2, on the computer screen is a still from the Ghostbusters Activision game. It appears on the back of the game's box next to "One Temple of Zuul. Two Terror Dogs. And a zillion ghosts."
**Egon mentions the Riemann Hypothesis, one of the famous unsolved problems in Mathematics. It was a conjecture that the Riemann zeta function has its zeros only at the negative even integers and complex numbers with real part 1/2.
**In panel 3, Egon plays with a Slinkie - a nod to a line about Egon's childhood in Ghostbusters II
**In panel 4, the Dimensionometer from The Real Ghostbusters episode "Egon on the Rampage" makes another non-canon cameo.
**In panel 4, right of the Dimensionometer, is a can of Blody - a staple drink on the series first advertised in The Real Ghostbusters episode "The Halloween Door"
**In panel 4, on the board are
***A theater ad for the first movie
***The Ghost in the Can England ad
***A Ninja Pizza ad from the 1987 Teenage Mutant Ninja Turtles pilot "Turtle Tracks"
***The McDonalds Canada tray liner advertising the second movie in 1989 of Ecto-1a by the Firehouse
**The set up on this board was previously seen in Teenage Mutant Ninja Turtles/Ghostbusters #4 page 6 panel 5.
**In panel 7, under Ray, are Rowan's drawings of himself from his copy of "Ghosts From Our Past" in the 2016 movie.
***The drawing of giant Rowan grabbing people opposite of the 'Open the Barrier' page
***The close up drawing of Rowan's face opposite of 'The Fourth Cataclysm' page
**Behind Egon as he takes off the analyzer colander is the Latent Image Sensor, a piece of equipment seen briefly in the first montage of Ghostbusters II.
*Page 21
**Janine is wearing an outfit from the first movie, notably when she gets the call from the Sedgewick Hotel.
**A case in the Bronx comes up
**The nature of the case appears to be a nod to the Kenner toy Fearsome Flush
**In panel 1, in Peter's office, still leaning on the wall are braces from ?
**Left of Janine, on the cabinet label is a reference to The Real Ghostbusters and 1986, the year it premiered.
**Kevin is inexplicably using crutches.
**Left of Kevin, on the top cabinet label is a reference to the Extreme Ghostbusters and 1997, the year it aired.
**On the bottom cabinet label is a reference to the first Ghostbusters movie and 1984.
**In panel 2, on the right on the paper, the Sandman from The Real Ghostbusters episode "Mr. Sandman, Dream Me a Dream" makes a non-canon cameo.
**Kevin's name patch is visible for the first time, revealing his last name to be Tanaka.
**Janine warns them about not tracking anything back. The Firehouse has been routinely breached. Recently by:
***Gozer and Tiamat in Volume 2 Issue #19 and 20
***Chi-You and his thralls in Teenage Mutant Ninja Turtles/Ghostbusters #4
***Proteus, Cerberus, and Ananke in Ghostbusters Get Real #3 and 4
***Granny Gross in Ghostbusters International #8
**Winston alludes to the mugs from Ghostbusters II
**In panel 3, on the slip of paper Winston has is "Millennium Biltmore Hotel 506 South Grand Avenue" - where parts of Sedgewick Hotel and 55 Central Park West scenes were filmed for the first movie.
*Page 23
**Mentioned in the Spectral Incident Report:
***The FBI Field Office in Minneapolis is mentioned
***Chicago
***Chicago Ghostbusters
***Kylie Griffin
***Superior, Wisconsin
***The Trask Hotel
**The Fairlawn Mansion is an actual landmark in Superior, Wisconsin at 906 East 2nd Street that is a public museum. The ghost of the servant girl, the cold chill, her suspected murder and reason for returning are part of the mansion's lore.
**The Trask Hotel is a stand-in for the Drake Hotel.
**Ron was strangled by the Skinless Man.
***He was previously attacked by the Five Points Murderer in Volume 2 Issue #13
***He was strangled by Egon in Volume 1 Issue #14
*Page 26
**The image on the collections page is reused from Ghostbusters International Issue #3 page 4 panel 3 when the Ghostbusters fire on the Plague Doctor.
To Be Identified/Confirmed
1. Page 1, Panel 2: Mike is the Restaurant Cop No. 1 from Ghostbusters II?
2. Page 10: The Devil's human look is based on? Brad Pitt from "Meet Joe Black"?
This Post Contains Spoilers