TNG - “The Survivors”

This episode always left me depressed. An all powerful entity trying to be good. Loses the person he loves and recreates her. But she’ll never be the real love of his life.

And does something unimaginable that even he can’t undo. A seriously heartbreaking episode from so many angles. This is Trek to its core. The moral questions. In this case, the ones that will not get answered.