Perseus and Andromeda (Leighton) daughters of Poseidon, the god of the sea. When the nymphs became aware of her claims, they protested to their father, who retaliated by calling up a sea monster called Cetus to patrol and wreak havoc along the coastline of Ethiopia placing Cassiope's kingdom at risk. In response the Queen, together with her husband Cepheus, decided to sacrifice her daughter, Princess Andromeda, to the monster. Andromeda was chained to a rock at the edge of the sea as an offering to the monster. Perseus was travelling back home on his winged horse, Pegasus, after battling with Medusa. He rescued Andromeda
Medusa (Supergirl) Medusa (Supergirl) "Medusa" is the eighth episode of the second season from The CW television series "Supergirl", which aired on November 28, 2016. The episode features a minor tie-in with the Arrowverse crossover event "Invasion!" Kara, James, Winn, Alex, Eliza and Mon-El celebrate Thanksgiving. Alex intends on coming out to Eliza, while James and Winn debate revealing the truth about Guardian. A mysterious interdimensional portal opens over the table. J'onn intends to discover Cadmus's plan with Kara's blood. Kara visits Lena Luthor to discern what she knows about her mother, Lillian Luthor, and Cadmus. Lena alerts Lillian that a reporter