Supergirl
Season 4, Episode 18: Crime and Punishment
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Kara and Lena head to Stryker's Island to search for clues on how to defeat Lex. At the prison, Kara tries to befriend a nosy prisoner, Steve, who may have insight into what Lex was doing, while Lena studies an array of puzzles Lex left behind in the hopes of discovering his whereabouts. While there, a prison riot breaks out and Kara must find a way to stop the prisoners without revealing her secret identity as Supergirl. Meanwhile, Kelly encourages James to talk to someone for his PTSD, and Alex faces off against Ben Lockwood after he storms the DEO and acquires some powerful weapons to hunt Supergirl.
All Episodes - Season 4
Episode 1
American Alien
Episode 2
Fallout
Episode 3
Man of Steel
Episode 4
Ahimsa
Episode 5
Parasite Lost
Episode 6
Call to Action
Episode 7
Rather the Fallen Angel
Episode 8
Bunker Hill
Episode 9
Elseworlds (III)
Episode 10
Suspicious Minds
Episode 11
Blood Memory
Episode 12
Menagerie
Episode 13
What's So Funny About Truth, Justice, and the American Way?
Episode 14
Stand and Deliver
Episode 15
O Brother, Where Art Thou?
Episode 16
The House of L
Episode 17
All About Eve
Episode 18
Crime and Punishment
Episode 19
American Dreamer
Episode 20
Will The Real Miss Tessmacher Please Stand Up?
Episode 21
Red Dawn
Episode 22
The Quest for Peace