Kara is caught in a dilemma.
Rhea escalates her dangerous plan.
Alex is kidnapped.
Kara questions Lena’s ex-boyfriend Jack Spheer.
Aliens attack National City.
A new villain comes to National City.
Kara investigates a series of alien kidnappings.
Mon-El is suspicious about the sudden return of someone in Kara’s life.
Mr. Mxyzptlk arrives on Earth and wreaks havoc on National City.
Kara fights to clear Lena’s name.
Supergirl battles to protect M’gann when a White Martian shows up.
Livewire threatens big trouble for Supergirl when she breaks out of prison.