On Monday night’s episode of Supergirl, J’onn J’onzz reports how he met Dr. Jeremiah Danvers and assumed Hank Henshaw’s identity.
Kara is depressed because the city has turned against her. She calls in sick.
Siobhan is mad at Kara because no one will hire her now that Kara ratted her out to Kat. Winn tries to convince her that she will overcome the setback.
J’onn wants Alex to distance herself from him so she doesn’t get arrested. She says she won’t abandon him.
Lucy Lane and Colonel Harper arrive to dig into the DEO employee’s backgrounds to see who had prior knowledge of J’onn. Alex says it sounds like a witch hunt. They start by interrogating J’onn.
Harper generates a stasis field that keeps J’onn from transforming or planting thoughts in his and Lucy’s minds. Supergirl tries to listen in, but they’ve blocked the room’s sound.
J’onn tells the story of his beginnings as Hank. Hank and the DEO brought Dr. Danvers with them to kill J’onn as an alien threat. While in the Peruvian Andes, they split up and Jeremiah is attacked by a venomous snake. J’onn saves him.
That night, Jeremiah tells J’onn that he’ll speak to Hank and explain that he is a good man. He says that his daughter is a refugee as well. J’onn says his daughters were killed on Mars.
Hank shoots J’onn in the leg and tries to kill him. Jeremiah attempts to wrestle the gun away from him. Hank goes over the edge of a cliff after stabbing Jeremiah in the stomach. Jeremiah asks J’onn to take care of his daughters. J’onn poses as Hank.
J’onn tells Harper that he’s dedicated his life to stopping alien attacks with the DEO. He accuses Harper of going after him just because he’s different. Harper accuses him of trying to take down Earth from inside the agency. Harper was best friends with the real Hank.
Alex tells Harper that Hank has saved her life many times. Harper informs her she’ll be interrogated next.
Siobhan breaks into Kat Co. after hours and opens Kara’s email program. She sends a nasty message to Kat posing as Kara.
Alex is hooked to a lie detector. Supergirl asks one of the DEO soldiers to take down the sound damper so she can listen in. The soldier refuses, but leaves her position. Kara listens to the interrogation.
Alex tells her story of meeting Hank. She was arrested for drunk driving. Hank came to her in jail and recruited her for the DEO, mentioning that he knew her father.
Alex tells Harper that Hank gave her purpose and claims that she didn’t know he was an alien. She passes the test, but Lucy knows she’s lying.
Alex is arrested. Supergirl asks where she’s being taken. Harper tells her that Alex and Hank are going to Project Cadmus.
Kara tells James that Lucy is working with Harper. She asks him about Project Cadmus. James says it works as a dissection lab to try to weaponize alien abilities for military purposes. No one knows where the facility is.
Lucy comes to Kara’s loft at James’s insistence. Kara tells Lucy that she’s Supergirl. Lucy says it all makes sense now. Kara asks for her help. She tells her that as an alien in a new world, your only choice is to hide.
Kara tells the story of trying to assimilate as a human child. Alex was invited to the beach by a boy and had to bring Kara along. Everyone thought she acted strange. Kara heard screaming and took off. She saved a woman and her baby from a burning car. Alex ran up behind and was hit by the door when the car exploded.
Jeremiah told Kara that Alex would be okay, but Kara had to hide her powers. He gave her a pair of glasses lined with lead to block her x-ray vision.
When Kara interviewed for the job with Kat Co., she impressed Kat with her modesty. Kara said she just wanted to be useful and worthwhile.
Kara tells Lucy that as an alien you will sacrifice anything just to belong. James asks if Lucy is willing to let Hank become a science experiment. Kara says if she goes along with Harper just to belong, then she is betraying herself. Kara showed her who she is because she trusts she’ll do the right thing.
In the transport truck, Harper tells J’onn that Project Cadmus is a necessary place to save human lives. He says he’s protecting the world. Lucy and Kara pull up to the back of the truck on motorcycles. The soldiers try to shoot them, but they blow out the truck’s tires. J’onn gets loose in the back while Kara and Lucy take out the soldier’s in the truck’s cab. J’onn erases Harper’s memories, but finds one of Jeremiah. He tells Alex her father is alive at Project Cadmus.
Alex tells Kara that’s she’s going on the run. She’s going to find out what happened to Jeremiah.
Kat calls Siobhan to her office. Winn analyzed the email and found the typing pattern matched Siobhan, not Kara. Kat threatens to call the police if Siobhan ever does it again.
Colonel Harper resigns and puts Lucy in charge of the DEO. Supergirl is worried that the city will never trust her again. Lucy reminds her that she won back her trust.
Winn finds Siobhan drunk on the roof. She tells him he was supposed to take her side. He says Kara is his best friend. He tells her he did it for her too. If her plan had worked, she would’ve regretted it. She yells at him and drunkenly falls over the edge. Her scream becomes supersonic and stops her before she hits the ground.