The whole statutory rape scenario came out of nowhere between Kate and the piano teacher.
So, was Ephram the better piano player than Kate? Ephram will never know.
I liked the UFO subplot, and how Amy and Edna got to spend (begrudingly) some quality time. Harold's eyerolling at Doc Brown's cases make me chuckle, they have a good dynamic going on. That lumberjack's wife was beating the tar out of the lumberjack.