Jumping the Shark: 10 Great TV Shows That Took a Turn for the Worse

From 'Buffy the Vampire Slayer' to 'True Blood,' these were the moments when our favorite series started to take a nosedive

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'Battlestar Galactica'

"All Along the Watchtower" (Season 3, Episode 20)
Cylons! They live among us. They look just like us. They're…strangely drawn to sitar covers of Bob Dylan songs? We were willing to roll with a lot of Battlestar's punches, because they usually propelled us to somewhere weird, dark and awesome. But Ronald D. Moore's show lost us in the third season finale, when it answered the series' burning question — who are the final five Cylons? — by drawing them into a room together because they all inexplicably had aural hallucinations of "All Along the Watchtower." At the same time, the recently deceased Kara "Starbuck" Thrace returned from the dead as…an angel? A really grumpy angel? The show's final season continued to traffic in this type of half-baked quasi-spiritual contrivance, culminating in a baffling, uncomfortably preachy final episode. But it was the "Watchtower" moment that first had us saying "oh, frack this."  JS