Just knowing these two exist puts my soul at peace.
Let's Kill Hitler; Such a pretty portrayal, without an ounce of banality, of everyone being little Hitlers, while people act inoffensively lively.
The Rings of Akhaten; Empoweringly concluding episode, that soothingly reminds of bad things, while being very sunny orange.
The Name of the Doctor
The Bells of Saint John
A Good Man Goes to War
The Beast Below
The Girl Who Waited seems like it should work super efficiently, but for some reason I haven't cared that much.
Just current era episodes for now.