The imagery of mind control and the timing of this classic film, now owned by Frank Sinatra’s estate, shows the power of suggestion and how even the best can get mixed up in the most tense of plots against government officials.  The final scene = razor’s edge.  Here is the link to the classic film, not the remake with Denzel.  That one is not good, sorry, Denzel:  https://amzn.to/2N5SZPI