Just in time for the fourth season premiere on The CW, catch up with the most courageous Super Heroine on TV, who flies into danger to save her city as Warner Bros. Home Entertainment brings you "Supergirl: The Complete Third Season" on Blu-ray and DVD on September 18, 2018. In Season Three, Kara Danvers grapples with the sacrifices she’s made personally while saving National City as Supergirl. She even considers covering up her human identity altogether. Being human and vulnerable is hard. Maybe she’s better off embracing her alien DNA and only being the “Girl of Steel.” As Kara struggles with her path forward, she continues to work with Hank Henshaw and her sister, Alex, at the Department of Extranormal Operations to battle all threats to National City, including new villains Morgan Edge, and the “Worldkiller,” known as Reign. Everything Kara’s ever known and everyone she’s ever loved will be tested in all 23 supercharged Supergirl adventures. This "supercut" features highlights from the series' third season, focusing on the Worldkillers that Supergirl must defeat with the help of her team.