Will Kara be able to save her friends?
On Supergirl Season 1 Episode 19 Non and Indigo employed mind control methods to turn the residents of National City into their own army, but what was their weakness? How could they possibly be stopped?
Kara's burgeoning relationship with James continued to heat up, but how did Winn feel about all of it?
How did Cat react to needing another assistant? You'll need to tune in to find out.
Use the video above to watch Supergirl online to find out how it set things in motion for the season finale!
Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.