Supergirl welcomes some new cast members while still stressing the importance of journalism as the fifth season premiered on Sunday night. The series changed up the status quo in the fourth season finale when Lex Luthor (Jon Cryer) revealed that Kara Danvers (Melissa Benoist) is Supergirl. There was no telling how Lena Luthor (Katie McGrath) would react. The fifth season started with Lena testing a virtual reality system. There’s no way that this is going…"Supergirl: Event Horizon (Season 5)"