With his ability to hypnotize anyone to do his bidding, Jervis Tetch (Benedict Samuel), also known as the Mad Hatter, is definitely one of the scariest villains in “Gotham” Season 3.

But Samuel told Collider that Jervis isn’t all-powerful, since his sister Alice (Naian Gonzales Norvind) is clearly his weakness. He considers her as his “biggest trigger” because without her, Jervis would spiral out of control.

“It’s become clear that Alice is the most important thing to him, and I can safely say that, without her, he certainly would be plunged down the rabbit hole of madness. Anything is possible from there,” he said.

It’s still unclear why Jervis needs Alice and is doing everything he can to find her. But one thing’s for sure: Jervis is acting out based on “his personal needs and wants.”

Samuel also acknowledged Jervis’ terrifying presence because he can “creep up on you and play on your insecurities, your fears and your darkest desires.” “I think all of us have something, deep down, which we wouldn’t want the world to know or anyone to use against us, and that’s exactly what he does. For a lot of people, that’s probably what’s most terrifying,” he said.

For now, Jervis has sought the help of Jim Gordon (Ben McKenzie) to track down Alice. But Samuel thinks Jervis would be better off teaming up with Ed Nygma (Cory Michael Smith).

“I definitely think there could be a kinship with Nygma. They could spend all day having tea, and kind of shooting the breeze with rhymes back and forth,” he told Blastr. “I am not sure if that will happen or not. I don’t know how exciting that would be to just see a scene where they are riddling back and forth. That would be cool. I think Jervis looks for people who have secrets.”

It might be best to leave Jervis to his own devices because Nygma is busy helping out his friend, Oswald Cobblepot (Robin Lord Taylor). Co-executive producer John Stephens told TV Insider that Penguin and Nygma will “become a real duo for the first half of the season” as they try to stake their claim in the city.