It is sincere without being soppy, a balancing act most shows fall off. If you ever wanted an episode with strong opinions about the universe, your day has come. There is a generous helping of flashbacks, served cold. It also finally answers a question from S02E04, "Why do you think? Fucking knobhead.", so patience pays, eventually. The best moment might be a single sentence: "I don't hear any grunting." Pleasant company for half an hour.