In Oppenheimer Robert Downey Jr. gave arguably his most intense performance. As Lewis Strauss, the government bureaucrat who destroys the career of J. Robert Oppenheimer (and maybe the future), he’s arrogance and entitlement personified, and the last hour is basically a prolonged panic attack. But when Downey won the Best Supporting Oscar, as predicted, at this year’s Academy Awards, he was back to his charming and self-deprecating self.