"A Dark Knight: The Fear Reaper" is the second episode of the fourth season of Gotham. It aired on September 28, 2017.
Under pressure to prove that the GCPD is still powerful, Gordon attempts to bring in Jonathan Crane. However, Gordon puts himself in a dangerous situation at Gotham Asylum when he is forced to fight off lunatics and the demon within himself. Meanwhile, with Barbara's unexpected return, Selina and Tabitha must consider risks that come with joining her in the weapon business.
The episode is dedicated in memory of digital compositor Lukas Drake who had passed away on July 30, 2017.