Season one of Barry was very good: as a show about a former marine-turned-hit man who discovers acting, the series made some darkly funny parallels between acting and assassination, and the personalities and psychological hang-ups typically (and sometimes atypically) associated with each profession. Season two is even better: delving into Barry’s past, the show invites us to compare his behavior during his tour of Afghanistan with his behavior in the present, interrogating the extent to which people can change.