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"Justice League" Flash and Substance (TV Episode 2006) Poster

(TV Series)

(2006)

Trivia

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Mark Hamill reprises his role as the Trickster, which he played in The Flash (1990). The character was even drawn to resemble him.
In the Flash Museum, The first Flash (Jay Garrick)'s helmet is on display, as well as the costume of Kid Flash (Wally West's previous hero name before donning the title of Flash).
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Flash mentions his uncle coming down to spend the Flash Appreciation Day/Flash Museum opening. In the comics, Wally's uncle was Barry Allen, the second Flash and Wally's mentor during his tenure as Kid Flash. The employer in the hospital where he works on investigations - a job Barry Allen actually had in the comics - may have been drawn to reference him.
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In some form or another, almost every major villain in the Flash's history appears in this episode, making cameos either at the Rogue's hangout or in depictions at the Flash Museum. The rogues at the bar include Weather Wizard, Turtle-Man, Thinker, Fiddler, Doctor Alchemy, Abra Kadabra, and Pied Piper.
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The ring The Flash has collected for the point of storing his suit marks the first appearance of a similar ring he used in the same way in the comics.
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Apart from the Flash standee, Wally's apartment also has a treadmill. This is a reference to the Cosmic Treadmill, a time travel device used by several Flashes.
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The female TV reporter of Asian decent is supposed to be Linda Park. In the comics she was a reporter she and Wally (the Flash) eventually get married.
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Spoilers 

The trivia item below may give away important plot points.

The blonde lab tech with the brush cut hair Wally hands his work to at the start of the show is an homage to Barry Allen (the second Flash) who was a police CSI.
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See also

Goofs | Crazy Credits | Quotes | Alternate Versions | Connections | Soundtracks

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