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- Writers: Ali Adler, Greg Berlanti, Andrew Kreisberg
- Stars: Melissa Benoist, Mehcad Brooks, Chyler Leigh, Jeremy Jordan
Supergirl and the DEO are assigned to protect the President when an attack on her causes alien vs. human rights in National City to heat up. Alex investigates the case with Maggie Sawyer while Kara fears Mon-El may be responsible.