AKA: Do You Really Want To Live Forever
The X-Files' Monster of the Week episodes exists in this weird gray area where they definitely exist and matter, but also kind of don't. With the exception of the rare sequel episode, the elements brought up in one rarely seem to affect the others, and our intrepid heroes almost never seem to remember lessons they've learned in other episodes (you'd think Mulder would remember the incredibly convoluted way to kill a vampire he learned in 3 in Bad Blood). Normally this is fine, but when an episode touches on the same theme or subject as another, it can get...frustrating.