If you'd rather stay as spoiler-free as possible regarding the upcoming crossover episode which sees The Flash star Grant Gustin appear in character on CBS' Supergirl, you should probably quit reading now. If, however, you'd like to know just who the super-powered heroes will be teaming up against, we have some behind-the-scenes images from the crossover special that reveal just that.

You didn't think The Flash would pop over to National City just to hang out with Supergirl, did you? Well, maybe he does, but that doesn't mean he wouldn't come in handy in a fight against two of Supergirl's powered-up antagonists. Last night's episode introduced Italia Ricci as Kara's in-office combatant Siobhan Smythe, but her villainous alter ego of Silver Banshee is set to be unleashed in next week's episode. Alongside Miss Smythe is the return of Brit Morgan as Leslie Willis, aka the electrifying Livewire. As it turns out, these two lethal ladies will be taking on the suited superheroes on the crossover special.

Get a look at the heroic and villainous team-ups below!


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The Supergirl episode, titled "World's Finest", will air on Monday, March 28th at 8pm on CBS. For more on Supergirl and The Flash, take a look at some of our recent coverage below:

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Image via Grant Gustin