Astra uses krypotnite against Kara, but it does not affect her. 

Kara escapes from Astra and explains to Alex and Hank that Astra has a suit that makes her immune to kryptonite. 

Cat's email has been hacked and personal information about her gets published. 

Cat asks Kara to go through her emails and look for anything that could be used against her. 

Astra is determined to convince Kara to join her rather than fight her. 

Alex is concerned that Kara is not ready to kill Astra if it comes to it. 

Kara overhears the chairman of the board, Armstrong, saying that he hired someone to hack Cat in order to have her removed from the company. Kara, James, and Winn go to Lucy for legal advice. 

Kara and Astra fight, but Kara can't finish it. She brings her to the DEO. 

Winn comes up with a plan to get access to Armstrong's computer files. 

Astra wakes up and will only talk to Kara. She tells her that her mother used her to lure Astra out of hiding.

Kara asks the virtual version of her mother if it was true, and is frustrated when she can't give her all the information.

Kara learns that Cat has another son that she sends money to but hasn't spoken to in years.

James, Lucy, and Winn find proof of Armstrong's hacking.

James tells Winn he should tell Kara how he feels.

Alex figures out Astra wanted Kara to defeat her. 

Cat figures out that Kara is Supergirl. 

Astra's goons attack Lord Technologies.