WARNING: The following article contains spoilers for the latest episode of Gotham, "Tresspassers," which aired Thursday on Fox.
Gotham's fourth season ended with quite a few shockers. On top of Gotham's bridges blowing up, the city's worst criminals laying claim to its divided territories, Selina Kyle getting shot and Bruce Wayne moving closer than ever before towards the mantle of the Dark Knight, we also saw the brief but noteworthy arrivals of several new Batman villains. Not only did the screeching Man-Bat make his terrifying first appearance, Mother -- a fairly recent addition in Batman's rogues' gallery -- also made her unsettling debut.
The scene, where a quiet and masked Mother looked on peacefully as a young boy in her care hammered a bloodied body with an axe in "No Man's Land," was no mere tease. In the second episode of Gotham's fifth season, "Tresspassers," James Gordon and Harvey Bullock come face-to-face with the frightening new villain.
Bullock and Gordon first become aware of Mother when they find themselves on the run from a gas mask-wearing No Man's Land gang. They find refuge in a creepy, abandoned hotel, only to learn it isn't abandoned at all. In the basement, Bullock discovers a veritable shop of horrors filled with instruments of death. A pile of bones, and an unsettling collection of teeth reveal that Mother is responsible for the death of many, many people.
A few floors up, Gordon finds a young boy who at first appears to be a lost victim. However, the charade drops when the boy leads Gordon into a trap room, a move that indicates this was actually the boy glimpsed in the Season 4 finale.
Mother made her comics debut in 2015's Batman & Robin Eternal #1, the cruel leader of a mysterious organization of killers comprised of orphaned children. In Gotham, the villain appears to have the same goals -- to "give" orphans a "home" and transform them into killers -- but she's even creepier in live-action thanks to the addition of her doll mask and haunting environment.
In the source material, Mother did not come alone. Her favorite and champion, Orphan, acted as her main enforcer. Though it would be a change from the comics, it's possible that the young boy seen in "No Man's Land" and "Tresspassers" is Gotham's Orphan.
Batman & Robin Eternal comic reimagined fan-favorite Bat-family member Cassandra Cain's origin as part of Mother's group before freeing herself and taking on the name Orphan as an ally to Batman. While we haven't seen Cassandra Cain in "Tresspassers," it's possible she exists in the Gotham universe, though it seems a little less likely that she'll be the Orphan producers have promised will arrive this season.
Airing Thursdays at 8 p.m. ET/PT on Fox, Gotham stars Ben McKenzie as James Gordon, Donal Logue as Harvey Bullock, David Mazouz as Bruce Wayne, Robin Lord Taylor as Penguin, Camren Bicondova as Selina Kyle, Erin Richards as Barbara Kean and Sean Pertwee as Alfred Pennyworth. The fifth and final season premiered on Jan. 3, and will run for 12 episodes.