Factual error: Near the beginning of the movie, the Slowhand album is on the turntable and the song "Lay Down Sally" is playing. The needle is near the end of the record, even though the song is the third of five tracks. Near the end of the movie, Meryl Streep drops the needle much closer to the beginning of the record to play the same song again.
Factual error: When Benedict Cumberbatch arrives by bus to Oklahoma City a digital sign shows the temperature at 104°. Yet as soon as he gets off the bus he puts on a woolen jacket. And Chris Cooper, who is waiting for him outdoors, wears a perfectly ironed and dry white shirt, which given the hellish heat ought to be soggy, rumpled, and sticking to his body.
