What is the most perfect season finale you’ve ever seen?

Hi.

Hope you’re doing well.

Could be a series finale, but I’m mainly talking about season finales in general.

I consider the Buffy season 5 finale “The Gift” to be the greatest season finale of all time.

The flashback sequence early in the episode set the stage nicely for the tension throughout. Buffy’s realization of her true responsibilities after five years of trying to balance being a teenager and a Slayer (that she must make this ultimate sacrifice for her sister Dawn and the world), it was just a very poignant and emotionally satisfying moment when she jumped into the portal and a perfect season finale for me and a lot of Buffy fans to an arguably perfect season of TV.

What is the most perfect season finale you’ve ever seen?