Supergirl (III)
Episode 19 - The Fanatical
On Air Date: 2018.06.13 (Wed)
A disciple of Coville's escapes from what's left of his cult and gives Kara and James a journal. From the journal, Kara learns that not only the cult is trying to make a new Worldkiller using a Kryptonian rock, but that the rock could also help save Sam who is taken over by Reign. Meanwhile, the cult, in order to get back the journal, threatens to expose James' identity as Guardian.