What is "jumping the shark"? The phrase, inspired by a fifth-season episode of "Happy Days" in which Fonzie jumps over a shark on water skis, is used to describe the moment when a TV series begins a sharp decline in quality.
From the birth, death or sudden arrival of new characters to bizarre storyline twists and awful gimmick episodes, TV series have jumped the shark in many, many ways.
Keep clicking to check out the 20 moments that marked the beginning of the end for some of your favorite series. —XFINITY Entertainment Staff (Photo: ABC)
The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.