Sweetpea is the coming of age meets female rage we didn’t know we needed, and Ella Purnell’s portrayal of quiet wallflower-turned-serial killer Rhiannon is dark, twisted and deeply relatable.

If you buy something through links on our site, Mashable may earn an affiliate commission. Ella Purnell in "Fallout." Credit: Courtesy of Prime Video Early on in one of Fallout's many flashbacks ...