Ella Purnell plays a wallflower-turned-murderer in the official trailer for Sky and Starz’s thriller series “Sweetpea.” The “Yellowjackets” and “Fallout” breakout stars as Rhiannon Lewis, a young woman who doesn’t particularly make an impression, in the six-part show based on C.J. Skuse’s novel of the same name. “People walk past her in the street without […]