Allusions to the DC Comics

Below is a list of characters, locations, etc., which originally appear in the DC Comics and other media prior to the episode's airing, by appearance.

Characters
Below is a list of characters who originally appeared in the DC Comics multiverse prior to the episode's airing, by appearance.
 * 1) Barry Allen/The Flash
 * 2) Linda Park
 * 3) Nora Allen
 * 4) Henry Allen
 * 5) Iris West
 * 6) Tina McGee
 * 7) The Ghost *
 * 8) James Jesse/The Trickster
 * 9) Captain Cold
 * 10) Samuel "Sam" Scudder

Comic book tie-in characters

 * 1) Vincent Everett/Kid Flash ("Flash TV Special") *

Referenced characters

 * 1) Carter Hall
 * 2) Gorilla Grodd

In-universe fictional characters

 * 1) Superman
 * 2) Batman
 * 3) Professor Zoom

Characters adapted as objects, concepts or groups

 * 1) Garrick Avenue
 * 2) Margo Lane
 * 3) Heat Wave

Fully renamed characters

 * 1) David McGee (fulfills the role of Jerry McGee)
 * 2) Desmond Powell/Nightshade (based on Wesley Dodds/Sandman, The Clipper and The Mikado)
 * 3) Curtis Bohannon (based on Mason Trollbridge, who took the mantle of second Clipper)

Characters from other sources appearing in comics
Notes:
 * 1) Grigori Rasputin
 * 1) Russell shares more then a passing resemblance with other DC comics characters nicknamed The Ghost, in particular Alec Rois.
 * 2) Despite not being particularly based on any character of that nickname from the comics, Everett is named Kid Flash and is partially inspired by several people who used the nickname.

Organizations

 * 1) Central City Police Department

Companies

 * 1) Star Labs

Locations

 * 1) Arkham
 * 2) The Flash Museum

Objects

 * 1) The Flash suit
 * 2) The Trickster suits
 * 3) Cold Gun
 * 4) Captain Cold's glasses