When his mother (Tricia Helfer) escaped Hell, Lucifer (Tom Ellis) was terrified of the destruction she might wreak. But when Lucifer picks up in Season 2, the fallen angel is shocked to discover Mom isn't out for revenge after all.
"She wants to be with her sons," Helfer tells TVGuide.com. "Obviously, she was banished to Hell for a very long time, so she's trying to make up for lost time in many ways."
Although Mom truly has good intentions for her relationships with Lucifer and Amenadiel (DB Woodside), that doesn't mean she isn't up to something even the devil would shake his head at. "She definitely has a dislike for humanity, so she's not too happy that she's stuck in an earthly skin sack, as she calls them. And going forward, she would definitely step on anyone who's in her way or trying to stop her from going forward with her agenda -- and she definitely does have an agenda," the actress explains.
"As this season progresses, we'll see more of what that is and it's in keeping with wanting to get back what she lost. She lost her family. She lost her life. She lost her home. So she definitely wants that back, so there is an agenda on Mom's part."
"Could that turn violent?" Helfer adds. "Absolutely."
To learn more about what Mom's life on earth looks like -- plus, what we should expect of Lucifer's other brother, Uriel -- check out everything else Helfer revealed about Lucifer's second season below:
Lucifer and Mom think they know everything about each other, when they really don't know each other at all anymore. What will surprise Lucifer and Mom the most about each other as they spend all this time together?
Helfer: I think what's surprising to Lucifer is how Mom isn't just hell-bent on revenge or out to get him. One of the fun things to see throughout filming is by Mom being there, how you get to see different sides of Lucifer and Amenadiel that you don't get to see on a regular basis. You get to see a wounded, vulnerable, young boy side to Lucifer that you don't get to see other times.
And I think they're learning to trust each other again. They're learning to co-exist down on Earth and Mom certainly has a way of getting in the way sometimes ... and smothering him to an extent. But going past that, Lucifer starts to realize that Mom does have an agenda and Mom starts to realize that Lucifer is maybe getting too close, enjoying it too much down here. And because of her dislike for humanity, she can't understand why he finds them fascinating.
What is Mom's opinion of Chloe (Lauren German) and her relationship with Lucifer?
Helfer: The audience is more aware, obviously, of Chloe and Lucifer's relationship. But Mom has been outside of that. Mom has met Chloe at this point, but doesn't know her, doesn't know her relationship. Mom knows that he works with the police, but she can't understand it. In many ways, she's trying to find her own feet in the first part of the season. And now that she's settled in, she's more aware of her surroundings and the closeness of Lucifer and Chloe will definitely start to get Mom's attention. But we're just starting to broach that now [in Episode 8].
Amenadiel is going through a lot of problems of his own this season. How will Mom factor into that storyline?
Helfer: Amenadiel definitely is going through a huge transition himself. As we know at the end of last season, he started to fall. He was always somebody that was closer and understood more of his father's perspective. ... Like any child of divorce, there are things the children understand or don't understand. When Mom left, Amenadiel was left with dad's description of what happened. So he was left with one side of the story as well. With Mom being there, he's definitely distrustful of her to begin with.
Things surrounding another son, Uriel, played by Michael Imperioli, coming down end up bringing Amenadiel and Mom together. He starts to see Mom and hear her side of things. With him falling and going through this internal struggle himself, and questioning for the first time his father's motivations, and here's his mom being there for him, so it starts to open his eyes to Mom a little bit more.
What can you reveal about the introduction of Uriel and how he shakes up the family dynamic?
Helfer: That episode will be quite explosive for the fans. Uriel coming down brings together Lucifer and Amenadiel in a way that they haven't been so far. Mom coming down also started bringing them together a bit. And then with Uriel coming down, it really does force them to take stock of things. It is quite an explosive episode and a very heavy episode for all of the family, but definitely for Lucifer.
Does Mom have a favorite son? And if so, who is it?
Helfer: Yes, Mom has a favorite son and I think it's Lucifer. Mom loves all her children and she loved her life before, but Lucifer in many ways follows after his mom. In many ways. Amendaiel has taken his father's side, and while Lucifer didn't take his mother's side, they have a lot of similarities. I think because he reminds her of herself quite a bit, he would probably be her favorite.
Given that Lucifer is her favorite son, how will Mom react when she learns that he brokered a deal with God to send her back to Hell?
Helfer: That is not going to sit well with Mom, so it will hurt her. How she reacts may be surprising. We broach that in the third episode.
Mom is in the body of a human, Charlotte Richards, who had a whole life and family of her own before she died. Will we see Mom step into Charlotte's identity?
Helfer: I won't give away the reason surrounding Mom stepping into Charlotte Richards' life, but you see that in the third episode. Charlotte Richards is alive to all the people around her. They never did find a body, obviously, because Mom took it over. So it's a big learning curve for Mom, having to deal with children. She has children of her own, but these are human children and she has to learn how to deal with that. And she has a husband and she has to learn how to deal with that. And ultimately, I suppose, she has to get back to work. In a way, work may be an escape from the house life she has to deal with, which she hugely detests.
Lucifer returns Monday at 9/8c on Fox.