Supergirl learns the true depth of Serena’s nefarious plans for Earth. Supergirl, Mon-El and Alura must devise a plan to stop her before Serena gets to Earth. J’onn prepares to say goodbye to his father.

Andrea Brooks, Anjali Jay, Carl Lumbly, Chad Lowe, Curtis Lum, Emma Tremblay, Erica Durance, Esmé Bianco, Rosemary Hochschild, Winsome Brown