Stacia Masters, pumping Barry Allen for information on the Flash's origins, speculates that he was "built" by some mad scientist, who she calls "Professor Zoom". Professor Zoom (a/k/a The Reverse Flash) was one of the Golden Age Flash's classic villains in the DC Comics series. Also, this episode features another reference to "The Hotel Infantino", a reference to Golden Age Flash co-creator Carmine Infantino.
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