This week on The Treatment, “Barbenheimer!” First, Elvis welcomes Greta Gerwig, director of the highly regarded summer box office smash, Barbie. She talks about her cinematic inspirations and how she hopes she hit the mark with her take on the iconic toy. Then, actor Cillian Murphy — star of Oppenheimer — joins to talk about disappearing into the role of “father of the atomic bomb,” J. Robert Oppenheimer.