Simon Neil has stated in various interviews that the title Infinity Land is a reference to serial killer Jeffrey Dahmer.
The episode's central antagonist is based on a composite of several real life murders, including Edmund Kemper and Jeffrey Dahmer.
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His fondness for conversing with his victims' bodies and the gregarious demeanour shown during this seems to be based on Milwaukee-based murderer Jeffrey Dahmer, who would also, like Dion, document his victims photographically.
In 1994 he formed a friendship with the converted serial killer Jeffrey Dahmer, eventually baptizing Dahmer just eight months before Dahmer was killed in prison in Portage, Wisconsin.
Jeffrey Sachs | Jeffrey Archer | Michael Jeffrey Shapiro | Jeffrey Steele | Jeffrey Lewis | Jeffrey Hunter | Jeffrey Katzenberg | Jeffrey Osborne | Jeffrey Dahmer | Richard Jeffrey | Jeffrey Tambor | Jeffrey Sweet | Jeffrey Loria | Jeffrey Kramer | Jeffrey White | Jeffrey Vallance | Jeffrey Steingarten | Jeffrey Richter | Jeffrey Kahane | Jeffrey Hornaday | Jeffrey Hatcher | Jeffrey Ching | Jeffrey T. Richelson | Jeffrey Tate | Jeffrey Swann | Jeffrey Shaw | Jeffrey Robinson | Jeffrey Quill | Jeffrey Pollack | Jeffrey Obrow |
Satan also decides to have a "really huge surprise as dessert"; he decides upon a cake the size and shape of a Ferrari Enzo, which three notorious serial killers—Ted Bundy, Jeffrey Dahmer, and John Wayne Gacy—are entrusted with bringing to the party in time for midnight.
On the flight home, he and Mfume discover that Evan Markham is, in fact, the Faceless Man while Sondra Avebury is the rogue soul enabling Markham to kill his victims with a minimum of struggle; together, the two of them slowly developed the "Violet Killer" modus operandi by appropriating details of famous serial killers (Jack the Ripper's ritual disembowlment, the Zodiac Killer's letters to the media; Jeffrey Dahmer's collection of body parts).