Season 02, Episode 13 – Mr. & Mrs. Mxyzptlk
A magical imp named Mr. Mxyzptlk shows up on Earth and declares his love for Kara, who tries to let him down easy. However, he won’t take no for an answer and starts to wreak havoc on National City. As Mon-El and Kara argue over how to get rid of Mr. Mxyzptlk, Alex and Maggie celebrate their first Valentine’s Day together.
Twenty-four-year-old Kara Zor-El, who was taken in by the Danvers family when she was 13 after being sent away from Krypton, must learn to embrace her powers after previously hiding them. The Danvers teach her to be careful with her powers, until she has to reveal them during an unexpected disaster, setting her on her journey of heroism.