The Quantum Leap Principles are a set of guidelines for navigating the infinite complexities of the timestream. Written by the great Sam Beckett himself, this treatise has been a cornerstone of time-traveling wisdom for centuries.
Small changes can have big consequences. Or, in the case of the Quantum Leapers, huge, galaxy-destroying consequences. Remember, you can't just jump back in time and change one thing, or the entire fabric of reality will unravel like a poorly made sweater.
Don't mess with the past, unless it's absolutely necessary. Your grandfather may have been a great man, but did he really deserve to have his cat die on Tuesday instead of Wednesday? The universe is a delicate balance of cat lives and human decisions.
A good leaper knows that cleanliness is next to...timelessness. Make sure to wash your hands before touching the timestream, or you'll risk bringing back all sorts of unwanted temporal germs.
Learn more about the Temporal Regulations