Plot: Kara gains a new ally when the Flash arrives from a parallel universe and helps her fight the Silver Banshee and Livewire in exchange for helping him return home.
Story: None
Did you know: The Flash crosses over while doing a test run on the Tachyon Enhancer as seen in
"Supergirl" Worlds Finest 2016
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Story: None
Did you know: The Flash crosses over while doing a test run on the Tachyon Enhancer as seen in
Release date: Not Available
User Votes: 8.9
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Runtime: 43 minutes
Oscars: None