These are the most incredible TV season finales. We know how important a series finale is, given the negative response to the last episode of hit shows like Lost and How I Met Your Mother . But it's equally crucial to wrap up a regular season's story and leave the characters in a fascinating place.

A season finale should have enough twists to make you excited about the next batch of episodes, or set up a brand new mystery or compelling arc, moving the show in a fresh direction. From a popular 1990s sitcom's romantic plotline to a sci-fi show with a huge surprise, these season finales are exciting to look back on.

Friends, "The One Where Rachel Finds Out"

Season 1, Episode 24

Rachel standing in front of her apartment door on Friends and looking serious

Rachel Green (Jennifer Ani

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