After Sara's encounter with Mallus, the Legends are paid a visit by John Constantine, a demonologist detective. The Legends agree to accompany him to a present-day psychiatric hospital and they are surprised to discover who Constantine is trying to help. During the exorcism, Sara, Leo and Constantine go missing, leaving Ray and Zari to try to take care of Constantine's client. Meanwhile, Amaya and Nate once again come face to face with Kuasa.
Quest roles:
Jes Macallan(Ava Sharpe), Matt Ryan(Dr. Gwyn Davies), Wentworth Miller(Leonard Snart / Captain Cold), Neal McDonough(Damien Darhk), Tracy Ifeachor(Kuasa), John Noble(Mallus (voice)), Madeleine Arthur(Nora Darhk), Annabel Marshall-Roth(Young Dr. Moore), Marilyn Norry(Dr. Ellen Moore), Kelly Metzger(Doctor), Craig Fraser(Attendant)