"Uncle Sheldon and a Hormonal Firecracker" is a solid entry in the season. It isn't the funniest episode, but it is one of the most important for the series' lore. It moves the pieces into place for the season finale and continues to flesh out Georgie as a complex character rather than just a punchline.
Just grabbed the HDRip for S05E20.
If you are watching for the lore of the Big Bang Theory universe, this episode is essential viewing for the Georgie/Mandy timeline. If you are watching for pure comedy, it offers mild chuckles but plenty of heart.