LOS ANGELES — “In every man, of course, a demon lies hidden — the demon of rage,” says the intellectual brother, Ivan, in Fyodor Dostoevsky’s “The Brothers Karamazov,” a theme to which the Russian novelist frequently returns.
It is also a theme central to the HBO series, “Barry,” whose fourth and final season premieres on Sunday, as the show’s titular hit man seeks to convince himself and others that he is ultimately a good person.
