Ep 12. A Dark Knight: Pieces of a Broken Mirror

The episode "A Dark Knight: Pieces of a Broken Mirror" is the twelfth episode of the fourth season of the television show Gotham. This episode follows the continued pursuit of Jerome Valeska, the show's version of the Joker, who has escaped from Arkham Asylum and is wreaking havoc on Gotham City. As Commissioner Jim Gordon and his team work to apprehend Jerome and stop his deadly plans, they must also contend with the rise of a group of criminals known as the Legion of Horribles.

The episode opens with Jerome continuing his reign of terror on Gotham, as he and his followers attack the city's financial district. Meanwhile, Jim Gordon and Harvey Bullock investigate a murder that they believe is connected to Jerome, and discover a disturbing message left by the villain. As they work to decipher the message and determine Jerome's next move, they also must deal with the infiltration of the GCPD by members of the Legion of Horribles, who are attempting to sabotage their efforts.

As the episode progresses, we see tensions rise within the Legion of Horribles, as members begin to question Jerome's leadership and his increasingly violent actions. One member, Jervis Tetch, expresses concern for the safety of their hostages, and Jerome responds by brutally attacking him and throwing him out of the group. We also see the return of Oswald Cobblepot, who is seeking revenge against Jerome for betraying him in an earlier episode.

As the GCPD closes in on Jerome and his followers, a shocking revelation is made about the true identity of one of the Legion of Horribles. This revelation leads to a major showdown between the GCPD and the villains, with multiple lives hanging in the balance. Meanwhile, Bruce Wayne continues his investigation into the mysterious Ra's al Ghul, and makes a startling discovery about the villain's plans for Gotham.

Overall, "A Dark Knight: Pieces of a Broken Mirror" is a tense and action-packed episode that sets up several major plotlines for the rest of the season. Fans of the show will be on the edge of their seats as they watch the characters confront some of their biggest challenges yet.