I saw this film for the first time after I watched the 1987 Kevin Costner film No Way Out, which is based on this 1948 Ray Milland movie. Both are good cat-and-mouse thrillers, different enough to be unique movies, but similar in all of the major plot points. The main difference between the two films is that The Big Clock is much less complicated and more focused on the main storyline, making it a tight, fast-paced thriller. Milland plays a magazine editor who somehow finds himself investigating a murder in which he played a major part. He also knows who the real murderer is but cannot reveal this salient piece of information without revealing his part in the crime. If you’re confused by all of that, then don’t see No Way Out which makes this premise even more muddled and twisted by adding a political twist to the story. The Big Clock might always be known as the movie No Way Out is based on, but it stands alone as a solid, thoroughly entertaining mystery.