One scene in the movie that never happened in real life is the scene where Bernstein lures Dardis’ receptionist away with a fake phone call in order to speak to Dardis. It is said that this scene is not found in Woodward and Bernstein’s book. http://mentalfloss.com/article/78307/13-investigative-facts-about-all-presidents-men,. - Courtlyn Plunkett

The movie used the actual names of the Watergate burglars along with Carl Bernstein and Bob Woodward's real names of investigative journalists who wrote about Watergate. –Caroline Collier