Supergirl
has to stop Mercy and Otis Graves from attacking the President’s Camp David
Alien Summit. The incident exposes the President as an alien while as the
Graves works with Agent Liberty to rid the world of aliens. In Russia another
Supergirl emerges. Mercy attacks L Corp however she gets captured and place in a cell next to her brother Otis however they both escape and poison Supergirl. Now Supergirl needs to wear a suit to protect herself from Krypton radiation affecting the world. The original of Agent Liberty is revealed as a xenophobic terrorist. Agent Liberty's identity is revealed to the public as Ben Lockwood while fighting Manchester Black and Supergirl.
Now the leader of the DEO wants Supergirl's identity to be revealed so Kara's sister Alex erases all memory of Kara to protect her. Manchester Black assembles the Elite to fight against Agent Liberty. They begin by targeting the White House with a satellite which Supergirl destroys. Lex Luthor returns by shooting James Olsen so her sister Lena Luthor can test the cure on him. Lex uses Lena's cure to heal himself and escapes custody while being confronted by Supergirl.
The back story reveals how Luthor manipulated Red Daughter and trick his sister by giving himself cancer. This allow Luthor to cure himself and have superpowers. Luthor teams up with another foreign country to attack the United States and he will set himself up to be its protector. He succeeds but Kara exposes Luthor who reveals to Lena that Kara is Supergirl before he dies. Now Season 5 sets up Leviathan as well as Crisis in Infinite Earths.
Now the leader of the DEO wants Supergirl's identity to be revealed so Kara's sister Alex erases all memory of Kara to protect her. Manchester Black assembles the Elite to fight against Agent Liberty. They begin by targeting the White House with a satellite which Supergirl destroys. Lex Luthor returns by shooting James Olsen so her sister Lena Luthor can test the cure on him. Lex uses Lena's cure to heal himself and escapes custody while being confronted by Supergirl.
The back story reveals how Luthor manipulated Red Daughter and trick his sister by giving himself cancer. This allow Luthor to cure himself and have superpowers. Luthor teams up with another foreign country to attack the United States and he will set himself up to be its protector. He succeeds but Kara exposes Luthor who reveals to Lena that Kara is Supergirl before he dies. Now Season 5 sets up Leviathan as well as Crisis in Infinite Earths.
