Leoni appears in the final minutes of the Season 4 finale as Sofia Caccimelio, wife of Nicky “The Neck” Caccimelio, a missing person with ties to the Caputo crime family mentioned previously in Episode 9 this season.
“I think she’s the great tease at the end of the finale and a little bit of an intriguing bump forward,” co-creator John Hoffman tells Deadline. “She’s an extension of the little news report in Episode 9 that Mabel makes note of at the hospital. [Sofia] is the wife of the Dry Cleaning King of Brooklyn, and maybe a couple of dry cleaning outlets in Manhattan, as well, we may come to know.”