Supergirl S3E13

Things that happened:

• Alex is taking a cynical approach to purity assuming that she is evil.
• Supergirl is more hopeful and believe that there is a human side to purity.
• Sam turns into reign while out ice skating with her daughter and leaves her there.
• Ruby calls Lena when she can't find her mom anymore and tells her about her moms episodes.
• Alex is still struggling with her breakup.

Top Moments:

• The team locates the other world killer along with a kryptonian crystal and supergirl realizes that the purity persona is different and Julia is still in there. Lena give Sam the day off.
• Supergirl tries to talk to Julia but Alex is not convinced. J'onn and Winn are going to help Mon-El fix the legion ship by using the battery on J'onns ship but it fails.
• Winn manages to activate the crystal and Purity breaks out of the DEO with the crystal. Mon-El reveals that one of the main reasons he got married to Imra was to unite two worlds.
• Supergirl locates Purity in the subway and has tech to counteract her vibrations. Purity gets the upper hand and Julia makes her way through before Reign shows up and takes her.
• Purity makes her transformation in the fortress and Winn and Imra were able to fix the battery on the ship. Mon-El tells Imra how he is feeling. Lena witnesses a blackout.

Predictions:

• I think Lena knows what is going on with Sam and that she is turning into Reign when she blacks out and disappears. 
• I think whatever Lena does will make it worse

Next Episode:  ????