Powerless Kara On SUPERGIRL!! Melissa Benoist On SETH!! Monday TV Talkback!! Read the full article on AICN The CW says of “Supergirl Lives”: Kara is moved by the story of a missing woman named Izzy and decides to investigate despite Snapper Carr's order to leave it alone. Kara takes Mon-El with her to the last place Izzy was seen and the duo find themselves thrust through a portal to another planet, Slaver's Moon, where the downtrodden are sold as slaves.