Supergirl: For Good

"For Good" is the twelfth episode of season three of the superhero fantasy series Supergirl and the fifty-fourth episode of the series overall. It was directed by Tawnia McKiernan with a script written by Cindy Lichtman and Alix Sternberg. It first aired on the CW Network on Monday, January 29th, 2018 at 8:00 pm.