This week, Supergirl and The Flash are airing musical episodes — a good use of the talents of Grant Gustin and Melissa Benoist, who had proved themselves on Glee. But theirs isn’t the only musical interlude on sci-fi television.

Shows like Supernatural have used music to turn their dramas into something less dramatic. But more often than not, music tends to amp up a show’s intensity. As we learned from heart-wrenching reveals on Buffy and Xena: Warrior Princess, sometimes things left unspoken can only be sung.

Here’s a look at nine times sci-fi TV has rocked our worlds.

Oh wait, did I say nine? There's a bonus below. A horrible bonus.