Supergirl S3E20

Things that happened:

• Alex and Ruby have been hanging out and are attacked while out.
• Winn and Ruby have a moment when Winn is put in charge of babysitting.
• Mon-El returns to the square and gives a child future tech to cure his illness.
• One of the Argo council members is the lady we have seen running the world killers.

Top Moments:

• Kara and Mon-El have traveled to the meteor. Reign cant be held for much longer. Kara and Mon-el discover a city on the meteor. Alex believes that someone is out to kill her. 
• Alex believes the person trying to kill her was her first arrest. Kara and Mon-El locate the rock and it turns out to me a memorial and Kara comes across her mother. Argo city has survived.
• Turns out that the rock they need is protecting Argo city and is shielding it and making it livable. Alex confronts Sherriff Collins and its clear it was not him. Alex gets attacked again.
• Lena is struggling with the idea of maybe killing Sam if Supergirl doesnt make it back in time. J'onn and Alex set a trap. Kara goes before the council to ask about getting a piece of the rock.
• Trap is set and hey are able to apprehend the fort Rozz prisoner. Kara convinces the council to give her a piece of the rock. Alex struggles with putting herself in danger and motherhood.
• Reign taunts Lena about the kill switch and not being able to pull the trigger. Reign breaks out and Supergirl and Mon-El show up just in time with the rock.

Predictions:

• Will the rock work?
• More story in Argo with the council member who is running the world killers. 

Next Episode: Supergirl leaves?