New SUPERGIRL Trailer Enjoy the new SUPERGIRL trailer! The new CBS series premieres October 26, starring Melissa Benoist, Calista Flockhart, Mechad Brooks, David Harewood, and Chyler Leigh. The adventures of Superman’s cousin in her own superhero career. Twenty-four-year-old Kara Zor-El,cousin of Superman, who was taken in by the Danvers family when she was 12 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.