Clash of the Titans (1981 film) be sacrificed to the Kraken on pain of Joppa's destruction. Perseus seeks a way to defeat the Kraken, but Pegasus is captured by Calibos and his men. Zeus commands Athena to give Perseus her owl Bubo; but she orders Hephaestus to build a golden replica of Bubo instead, who leads Perseus to the Stygian Witches. By taking their magic eye, Perseus forces them to reveal that the only way to defeat the Kraken is by using the head of Medusa, who lives on an island in the River Styx at the edge of the Underworld. The next day, the group
Medusa (Supergirl) is raising suspicions about her. Hank Henshaw plants a device that unleashes smoke at the bar, which kills all the aliens inside except for Mon-El. Mon-El is placed in isolation and Eliza is brought in to figure out the toxin. The virus consumes Mon-El before Eliza determines it is Kryptonian. Kara determines Cadmus needed her blood so Henshaw could break into the Fortress of Solitude. Kelex regards Kara as an intruder and attacks; she learns Henshaw accessed the file on Medusa, a virus created for defense against potential invaders by her father. Eliza affirms her support for Alex coming out.