7. “Keystone Kops” (Issues 28-31)
Just like every hero is different, so is every city. And in this story we get to see the MCU go up against a villain they aren't used to. After an unfortunate accident, a GCPD cop is exposed to a leftover experiment by Flash villain Dr. Alchemy. In order to figure out what's going on and cure the officer, Montoya and Allen go to Keystone City and team up with KCPD Detectives Chyre and Morillo.
Chyre and Morillo were two of my favorite supporting characters from the Geoff Johns Flash run so seeing them palling around with our resident detectives was a real fanboy moment for me. The foursome work really well together and seeing Renee and Crispus's reactions to the very different world of the KCPD are especially entertaining.
This arc is essentially a Batman/Flash crossover where only the supporting casts cross over which is absolutely perfect. Plus, we get some great furthering of Montoya's overall character arc in this one. Plus, Dr. Alchemy is a Gotham-caliber villain so seeing him get his due makes the story more than worth it.

