Plot hole: When Eddie Mannix first views scenes from the movie Hail Ceasar there is a scene depicting Saul of Tarsus (St Paul), but the movie-in-movie's climatic scene and speech are set at the crucifixion of Jesus which happened several years before the events depicted as happening to Saul / Paul.
Hail, Caesar! (2016)
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Directed by: Joel Coen, Ethan Coen
Starring: George Clooney, Ralph Fiennes, Josh Brolin, Alden Ehrenreich
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More mistakes in Hail, Caesar!
Baird Whitlock: Hey, Obie. You're a Communist, too?
Trivia: Despite receiving prominent billing, Jonah Hill is only in the film for three minutes.