Warning: Full spoilers for the episode below. In what just might be The X-Files' final standalone episode (save for the final few minutes, which seemed to set up next week's season finale),"Nothing Lasts Forever" saw both Mulder and Scully confronting aging while on the goofy, gory trail of a cult devoted to a silver screen has-been violently opposed to growing old (played with panache by Fiona Vroom - who also played CSM's wife in a flashback back in the season premiere).