Anachronisms

One of Kennedy's advisers uses the term "as pure as Mother Teresa." Although the BBC aired a documentary in the UK on Mother Teresa in 1969, it was not until 1971 that the US knew of her work through the book, " Something Beautiful for God."

Factual errors

The car Ted Kennedy was driving at Chappaquiddick was a 4 door sedan with center pillars behind the front doors. The car in the movie is a 4 door pillarless hardtop. .

Factual errors

The movie depicts the moon being full on the night of Kennedy's crash; in reality, the moon was full July 29, which meant that it would have been a waxing crescent on the night July 18.

Anachronisms

The exterior door used in the movie as the home of the Kopechnes is a fiberglass model with an oval glass insert with brass caming. This style of door didn't exist until the mid 1980s.