On tonight's episode of The CW's The Flash, Barry Allen makes his first on-screen visit to Keystone City -- and a nod to one of Keystone's most famous residents.
Keystone City is where the Golden Age Flash, Jay Garrick, called home before a dimensional barrier separated the two cities and wiped out residents' memories of the other. When he got his powers, Barry took the name of The Flash because of his love for Jay's adventures...which he read as comic books, mistakenly believing them to be fictional.
Years later, "The Flash of Two Worlds" introduced the concept of DC Comics' multiverse, when Jay and Barry came face to face. After that, Keystone and Central would no longer be separate -- and Barry's nephew Wally West would even live in Keystone during his time as The Flash following Barry's death in Crisis on Infinite Earths.
Here, it doesn't appear as though Jay is a comic book superhero (at least not that we know of). Instead, he's got a whole portion of Keystone named after him -- historic Garrick's Wharf. You can see the image above, as Barry and Eddie are taking in a suspect for questioning about Tony "Girder" Woodward.
Considering the identity of tonight's villain, it's kind of ironic that the iconic comic book cover depicting this historic first meeting of Earth-1 and Earth-2 depicts the Flashes saving a man from a falling, steel girder.