Ben McKenzie stars as Gordon, alongside returning principal cast members Donal Logue, David Mazouz, Morena Baccarin, Sean Pertwee, Robin Lord Taylor, Erin Richards, Camren Bicondova, Cory Michael Smith, Jessica Lucas and Chris Chalk.

[42] The No Man's Land arc was planned three years in advance, and the producers intended for it to be an "inspiration", rather than a "religious" adaptation of the comic book storyline.

[43] Main cast members Ben McKenzie, Donal Logue, David Mazouz, Morena Baccarin, Sean Pertwee, Robin Lord Taylor, Erin Richards, Camren Bicondova, Cory Michael Smith, Jessica Lucas and Chris Chalk return from previous seasons as James Gordon, Harvey Bullock, Bruce Wayne, Leslie Thompkins,[40] Alfred Pennyworth,[44] Oswald Cobblepot / Penguin,[40] Barbara Kean,[45] Selina Kyle,[46] Edward Nygma / Riddler,[40] Tabitha Galavan,[47] and Lucius Fox.

[50] In October 2018, Jaime Murray was cast in a recurring role as Theresa Walker;[4] it was eventually revealed that her character was actually Nyssa al Ghul.

[52] Stephens compared the Batsuit worn by Bruce Wayne in the season finale to the one seen in the film The Dark Knight Rises (2012) due to being a matte, metallic short-eared battlesuit.

At Lord Taylor's request, the costume designer consciously avoided making Cobblepot resemble Violet Beauregarde's "blueberry girl" look from Willy Wonka & the Chocolate Factory (1971) and instead went for a "little more monstrous" look, which included depicting the character with a hunch.

[56] Additionally, Edward Nygma's season finale Riddler costume was designed to look exactly as in the comics, by having a green color scheme and being filled with question marks throughout.

[60] Erin Richards directed "The Trial of Jim Gordon", which was the season's twelfth and final episode to be produced but ninth to air,[17] making her directorial debut on television.

The website's critical consensus reads, "Gotham concludes in a glorious free-for-all that takes full advantage of the series' dense roster of colorful villains, making for an extended climax that is equal parts daffy and thrilling.