The Enterprise returns to the planet where Data was discovered, and find a similar android. Data’s brother?

There is so much going on in this episode, and I have to pretend like it’s 1988. This is the first time we hear of Noonien Soong. This is also the first appearance of both Lore and the Crystalline Entity.

I summarize the plot and point out and explain all the references so you don’t have to.