Watch Supergirl Online: Season 3 Episode 19

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Was Tanya a trustworthy new ally for the team?

That was addressed on Supergirl Season 3 Episode 19 when he escaped from what was left of his cult and gifted Kara a journal that could be the key to saving Sam from her murderous alter ego. 

Meanwhile, the truth about Guardian's identity was revealed, and the team had to spring into action to save James. 

Also, James wondered whether being without a mask would benefit his cause. 

Use the video above to watch Supergirl online right here via TV Fanatic. 

Get caught up on all the fun right now. 

Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.

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Supergirl Season 3 Episode 19 Quotes

For the past two years, I've had to be dishonest with her while she's been opening up to me. Lillian Luthor said it, and she was right. If Lena ever found out that I was Supergirl, she would be devastated, and she would lump me in with every other person in her life that's betrayed her.


I told you about Kryptonite. And I will tell you if I make it again, 'cause I agreed to that. But, with regards to other things I work on, this may come as a shock to you, but I don't think about you while I'm doing it.