Why are there so many songs about rainbows? And what’s on the other side? And what’s up with David Haller singing a song about rainbows (and what’s on the other side) while hidden away in his “white room” sanctuary in this week’s episode of Legion? The A.V. Club doesn’t have definitive answers to these questions, but they do have a lot of affection for that scene—and a few second thoughts about using “The Rainbow Connection” as a lullaby from now on.