This promo for the next episode of Batwoman shows Ryan Wilder has been poisoned by kryptonite, and it has reached her brain... which may explain why she's hell-bent on killing Kate Kane's evil sister, stat.
Batwoman airs Sundays at 8:00 PM ET on CW.
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Andy Hunsaker has a head full of sitcom gags and nerd-genre lore, and can be followed @AndyHunsaker if you're into that sort of thing.