Contains spoilers from Supergirl Season 4, Episode 18.
Supergirl's fourth season has seen a number of surprising twists and turns in recent weeks, all of which have taken the story in a rather unexpected direction. A season that started off very much focused on addressing real-world issues of bigotry and discrimination successfully, it managed to reinforce its message with the introduction of DC Comics' most dangerous mastermind Lex Luthor.
Returning from another brief hiatus, this week's episode 'Crime and Punishment' dealt with the fallout of Lex's master-plan - which saw the Red Daughter dress up as Supergirl and decimate a bunch of White House officials in a bid to frame the Girl of Steel - as Kara found herself at the heart of a global manhunt spearheaded by President Baker's Director of Alien Affairs, Ben Lockwood a.k.a. Agent Liberty.
Meanwhile, James Olsen continued to deal with his PTSD and, in doing so, discovered some interesting side-effects while Alex tried to appeal to a different side of Colonel Haley.
'Crime and Punishment' successfully utilised a self-contained plot to serve as a microcosm of the larger story, addressing the impact that Supergirl has had on humanity while highlighting how those around her were struggling with their belief in her. There were multiple problems, but none that significantly detracted from the overall experience.