Pegasus Plaza Perseus slew the serpent-haired monster Medusa and Pegasus sprang from her severed head. He stamped the earth with his hoof, creating the Fountain of the Muses. A limestone fountain and winding stream anchor the design of the plaza. The fountain is connected to a natural mineral spring below the Magnolia Building and is the source well for water in the plaza. A series of concentric circles embedded in the pavement radiates from the fountain into the surrounding streets. Scattered throughout the plaza are nine granite boulders taken from Marble Falls carved and dedicated to the nine Muses. A stone dedicated
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.