6. 'Twin Peaks'
The 1990s were just four months old when ABC aired the Twin Peaks pilot. Even without Twitter, it was an instant phenomenon. Back when most shows didn't get more complicated than Full House or Murphy Brown, this one dared to be confusing and surreal. It began with the death of a teenage girl and headed into directions nobody could have seen coming. The ratings were huge at first, but when the central mystery was resolved in the second season – the point where things started to get really weird – ratings went down and the show was cancelled.