Supergirl S02E08: Medusa
Supergirl S02E08, At the Fortress of Solitude, Kara discovers that Cyborg Superman was after “Medusa”, an infection created by Kara’s dad to murder all non-Kryptonian outsiders if there should be an occurrence of an attack. Cyborg Superman assaults L-Corp searching for the isotope required to scatter the infection, yet Kara stops him. in any case it is latent, as Lena exchanged the isotope with a fake to pick up Lillian’s trust. Lillian is captured, however Cyborg Superman get away.