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On Supergirl Season 2 Episode 22, Kara challenges Rhea to battle to save National City. Meanwhile, Superman returns and Cat offers Supergirl some advice.
On Supergirl Season 2 Episode 21, Supergirl grapples with whether or not to obey the President's orders regarding Rhea's latest actions. Meanwhile, Cat returns to National City.
On Supergirl Season 2 Episode 20, an alien called a Phorian with telekinetic powers attacks the city. Meanwhile, Rhea's plan escalates.
On Supergirl Season 2 Episode 19, Alex is kidnapped, and the kidnapper wants a criminal released in exchange for her life. Kara and Maggie work together to save her.
On Supergirl Season 2 Episode 18, Lena's ex-boyfriend comes to National City to unveil his new nano-technology that has the potential to eradicate diseases.
On Supergirl Season 2 Episode 17, a large bounty is put on Supergirl causing aliens to attack National City intent on taking her out. Alex and Maggie run into Maggie's ex.
On Supergirl Season 2 Episode 16, a new villain is in town and Winn's girlfriend gets him in trouble with the law. The Music Meister attacks Supergirl.
On Supergirl Season 2 Episode 15, Alex searches for Jeremiah and Kara investigates a series of alien kidnappings. Kara sets up an interview between Snapper and Supergirl.
On Supergirl Season 2 Episode 14, Jeremiah is rescued from Cadmus and Kara and Alex are thrilled to have him back, but Mon-El is suspicious of his return.
On Supergirl Season 2 Episode 13, Mr. Mxyzptlk arrives and declares his love for Kara. She tries to let him down easy, but he wreaks havoc on Natonal City.