This week, we return to the popular Men in Black franchise with MIB III. Given that the first film was released 15 years ago, how can the filmmakers hope to keep the material fresh and not simply rest on familiar laurels? Oh wait, I know, time travel! This time around, Agent J, played once again by blockbuster titan Will Smith, must travel back to the 1960s to interact with a younger version of Tommy Lee Jones’ Agent K; the more youthful model K played by Josh Brolin. We will grant you that time travel is nothing new to cinema, but the plot of MIB III did get us thinking about our favorite time travel devices from years past.