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Fallout Season 2 has brought plenty of new developments with it. A new setting in the form of New Vegas (though the writers of that game might not have noticed) and the appearance of the iconic Deathclaw for the first time. Perhaps the biggest change so far came in Fallout Season 2 Episode 4, when Ella Purnell’s character Lucy gets a taste for blood thanks to a heavy dose of drugs, something the actor found particularly “scandalous.”

During the course of Fallout Season 2 Episode 4, titled The Demon in the Snow, Lucy MacLean finds herself recovering from the torture inflicted on her by the Legion in the previous episode. She is brought back to health by members of the New California Republic, who have hooked her up to an IV of an unknown substance. Turns out that substance is Buffout, a drug from the game series that increases strength and speed at the expense of being highly addictive. It turns Ella Purnell’s normally friendly and upbeat Lucy into an eager killing machine as she shoots down a host of ghouls outside New Vegas.

In a recent interview, Purnell admitted that the drug trip Lucy goes on in this episode of Fallout Season 2 is her “favorite part of Season 2.” It is such a huge departure for both the character and the actor that she almost felt bad about playing it out.

“I couldn’t believe it,” the Fallout star explained. “I felt so scandalous. Coming from any other character, you’d be like, ‘Yeah, it’s just Fallout,’ but just something about it being Lucy, it feels scandalous. I couldn’t believe it. It’s like when your, like, little sister goes out and gets a little wild – it’s crazy. Very fun to see that side of her, to play that side of her, and also, a new experience for me. I haven’t done a lot of that in my career. I didn’t know how it was gonna turn out. It turned out good, thank God, I think.”

Fallout Season 2 – complete with Lucy’s newly discovered drug addiction – is currently airing on Prime Video.

Get ready to get out of your Vault and into the Fallout world - with our help, of course. Here is a guide to the Fallout timeline, how to play and watch all of Fallout, details on the Fallout cast, how the Fallout cast & crew really get the harsh humor we're looking for, as well as a Q&A with Fallout showrunners Geneva Robertson-Dworet and Graham Wagner.