4. Twin Peaks - Season 2 Finale (The Last Evening)
Until last year, the finale to Twin Peaks would have been viewed as either a frustrating or brilliant series finale. But thanks to the show's resurrection in 2016, the season two finale can now firmly be classed as a great season cliffhanger - albeit with a 25 year gap between episodes. After solving the murder of Laura Palmer half-way through season two, the remaining episodes stumbled until the emergence of the Black Lodge in the final run. The finale saw Cooper travel into the Black Lodge to save his girlfriend Annie from Windom Earle, a journey that would end in tragedy as the good Cooper found himself trapped while his evil, Bob-possessed doppelganger escaped into the real world to wreak havoc. Now twenty five years later, that future glimpsed in Cooper's dream looks set to become real; the only question is how the good Cooper escapes the Black Lodge after a quarter of a century. 2016 can't come soon enough.