VIDEO : Song In 'Supergirl' Season 3 Premiere Is Sadly Fitting

Supergirl's third season has officially begun, and it kicked off with the help of a pretty breathtaking song.
The song in Supergirl's opening scene is 'Daydreaming', a song by Los Angeles-based artist Rosa V Pullman. You can listen to it here.
Mild spoilers for Supergirl's season three premiere, 'Girl of Steel', below.
In the opening moments of the episode, Kara Danvers/Supergirl (Melissa Benoist) is shown walking slowly through an alien planet.