Here are the relevant images from this episode of Zero Hour Strikes!
Highlights from Booster Gold #0 by Geoff Johns, Jeff Katz, Dan Jurgens and Norm Rapmund; Adventures of Superman #522 by Karl Kesel, Stuart Immonen and José Marzan Jr.; and Impulse: Bart Saves the Universe by Christopher Priest, Jason Johnson and Edwin Rosell:
Cut scene from Zero Hour!
Going to Earth-OMAC.
In Adventures of Superman, the heroes try to rebuild Metropolis:
J'Onn's creepy third arm:
The kids having their fun:
In Bart Saves the Universe, Impulse isn't the most appreciated hero.
And the final showdown between universe-ending threat Extant and (checks) Impulse?!
Relevant teaser clip: Doctor Who's "The Aztecs", starring William Hartnell.
End theme music from "The Time Tunnel Theme" by John Williams
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