It's not every day that an exuberant comedy about a Mattel doll goes head-to-head with a brooding drama about the father of the atomic bomb, but both Barbie and Oppenheimer deliver. Above, Margot Robbie as Barbie and Cillian Murphy as J. Robert Oppenheimer. (Jaap Buitendijk, Warner Bros. / Melinda Sue Gordon, Universal Pictures)