In the opening sequence with the clocks, just when the on-screen credit caption Christopher Lloyd is depicted, at the end of the name there is a 10-hour clock in the background. It reappears in full view when the credit caption "The Power of Love" - Performed by Huey Lewis and The News is displayed. This timing was officially used in France from 1794 for a little more than six months. This specific clock has a truly unique feature, it operates counterclockwise. The internet is not able to guide to any other such apparatus.

However, the clock shows the wrong time. 7:53 a.m. standard time is 3:28:48 French decimal time, based on the 10-hours-a-day clock; the decimal clock shows 7:85 decimal time (the hour hand is a few minutes fast), which is 18:50:24 or 6:50:24 p.m. standard time.