Money was seen and used extensively throughout Marty McFly's travels through time.
After having arrived on November 12, 1955, Doc pulled out his money suitcase which contained several wads of dollar bills from different time periods (all clearly labeled); these included 1861, 1863, 1875, 1914, and 1917.
Biff Tannen had his own form of currency in 1985A, featuring his portrait where a US President's would go normally. Also, the huge neon illustration of Biff at the entrance to Biff Tannen's Pleasure Paradise Casino & Hotel depicted him lighting a cigar with a burning $100 bill.
In 2015, dollar bills had security threads and barcodes, but by this time cash was rarely used as thumbprints had become an alternate form of currency; most transactions being automatic and signed on a thumb pad. As 2015 money did not have the marking of "Federal Reserve Note", it was strongly suggested that central banking was abolished in the United States by 2015.
Behind the scenesEdit
- Images of 2015 currency appear not too radically different from bills that have since been released in the United States in the 2000s, where the portrait of the President is offset or the individual is removed from the portrait. There is also the inclusion of security threads and other features.
- If there ever was an idea that Lou noticed the date on money handed to him, let alone "attempted to have Marty arrested for passing counterfeit money", it was not in the first  nor fourth  draft of the screenplay. Scenes were written in both versions, as well as the novelization, showing Marty attempting to pay with a $20 bill and being told "What do you think this is, a bank?" (in 2012, this would be similar to paying for coffee with a $100 bill), but not included in the film itself. A subplot about Lou suspecting Marty of passing counterfeit money would not only have distracted from the film, but would also have been inconsistent with Marty's subsequent visits to Lou's Cafe.
- In Back to the Future Part II, Marty did not throw a coin, or anything else, into the stairwell to cause a distraction while running down the hotel stairs to escape Biff's gang. Moving more quickly, he hopped the railing to get to another staircase, running upward toward the roof, while the gang continued downward. However, in the novelization by Craig Shaw Gardner, which was adapted from an earlier script, Marty did toss a quarter down the stairway to confuse Biff's gang. (page 185)
- In the novelization by Craig Shaw Gardner, an explanation is given as to how Marty purchased Gray's Sports Almanac. Next to the almanac in the window, Marty sees a sign that says "WE BUY ANTIQUE BILLS AND COINS" and reasons to himself, 'So he could even pay for it from his own wallet. It was perfect!' (quote, p60), implying that he then sold his 30+ year-old coins and bills for more than their face value. As a used reference book already 15 years out of date in 2015 (and had pages made of inferior paper that did not repel dust), the almanac itself would probably not be as expensive as the antiques. Neither the novelization, nor the film, show Marty actually selling his "antique" money. The film shows that the store window has the words "ANTIQUE COINS" in large letters on the outside; in editing, the scene shifts from Marty talking with Terry, to Marty receiving the already-purchased book from the saleslady.
- Back to the Future trilogy
- Back to the Future: The Animated Series
- Back to the Future: The Game