Theres no question that How I Met Your Mother had it's ups and downs throughout it's run on TV. While the season finale of How I Met Your Mother may have left a bad taste in the mouths of fans, the earlier seasons are sill some of the best sitcom episodes ever produced. Though this specific season of How I Met Your Mother stands above the rest. It's difficult to put season a perfect singular episode of a sitcom, but How I Met Your Mother was able to perfect an entire season.