Lost: The ending
The grandaddy of them all. One of the most acclaimed series in television history decided to go full-on spiritual after toying with harder sci-fi concepts for the entire run of the show. From smoke monsters to secret scientific study bases and dead characters coming back to life/reappearing in visions, the show had a lot of questions hanging out there for the final season.
As grandiose as it was meant to be, most fans would agree that the big finale in the church was just a massive letdown. Everyone meets up in the afterlife, and it was all about the journey or blah, blah, blah. Fans were holding out for some epic sci-fi answer to the island, and it just didn’t come.