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)
Plot summary
Directed by: Joel Coen, Ethan Coen
Starring: George Clooney, Ralph Fiennes, Josh Brolin, Alden Ehrenreich
When a movie star is kidnapped mid-filming, a studio "fixer" has to work out who's taken him and why, while keeping day to day events on the lot on track.
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.