Watch Supergirl Online: Season 4 Episode 16

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What was Lex's ultimate plan?

On Supergirl Season 4 Episode 16, the elusive villain finally revealed his true intentions to a stunned Lena. 

Lena was particularly surprised that he was working with Supergirl's doppelganger on a plot that would bring National City to its knees. 

The plan spanned two years, and Lena had to decide whether to side with her brother or the side of good. 

A Division - Tall  - Supergirl Season 4 Episode 15

Meanwhile, Kara struggled to make sense of the fact that somebody was impersonating her. 

Did she find out the truth before she was put behind bars?

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

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

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Supergirl Season 4 Episode 16 Quotes

Supergirl: How are you doing this?
Lex: How do you think I did it? I'm Lex Luthor.

Lex Luthor: My father was a bad man too.
Mikhail: What did yours do?
Lex Luthor: He stayed.