This episode features samples taken from the movie 'Momento', in it Guy Pearce stars as Leonard Shelby a man who due to a confrontation with an intruder in which he received a blow to the head, can now only remember for 15 minutes as he is unable to 'make new memories' as he describes it.
This raises an interesting question, when you think about it, your memories are only as real as your dreams at night or fantasies about your future.
If you were to lose your ability to make new memories, your only reality would be what is happening to you right now.
The past would be as none existant as any other thought in your mind.
It's only your memory that keeps the past alive but as is mentioned in Momento, memories can be distorted!