User blog comment:Xandermcc/More Arrowverse PSA's?/@comment-24695878-20170216205520/@comment-27700324-20170217165333

There was never a global warming episode, however there was an episode about bombings that was switched with the Livewire episode in S1 because they didn't want to show it right after some bombings in France. So episode four is now the Livewire episode, and episode five is the bombing episode.