Kara, devastated by the loss of Krypton, struggles to adjust to her new life on Earth. Her cousin, Superman, mentors her and suggests she leave their space-time to attend the Legion Academy in the 31st century, where she makes new … Meg Donnelly, Harry Shum Jr., Darren Criss, Jensen Ackles, Matt Bomer, Cynthia Hamidi, Yuri Lowenthal Added on HBO 2023-09-04. Youtube Trailer