There are probably very few serious movie fans who haven’t played the parlor game “Six Degrees of Kevin Bacon,” in which someone names an actor and the player has to connect that performer to Kevin Bacon through others he or she has worked with in six moves or less. (For example, if you were given Keanu Reeves, you could link him to Bacon in three moves -- Reeves and Dennis Hopper worked together in Speed
, Hopper co-starred with Jack Nicholson in Easy Rider
, and Nicholson appeared in A Few Good Men
with Kevin Bacon.) The notion that folks with seemingly nothing in common can be linked by their shared acquaintances is hardly limited to the star of...