In the dinner scene at Lorraine's house, her father rolls the new TV set into the dining room so that the family can watch during dinner. The show on at the time is "The Honeymooners." Marty remarks about having seen the episode before as a rerun and Lorraine's brother says he could not have because "It's brand new." In fact, the episode in question is "The Man From Space" which originally aired on December 31, 1955. Because Marty's trip back in time occurred in November 1955, for them to be watching it at that time would make it not only "brand new" but quite ahead of it's time.