Entertainment Other Read Time : 1 Minutes The Cast Of CW’s THE FLASH Singing The Theme From FIREFLY March 26, 2015 Hoob Joss Whedon got wind of the project and donated a whopping $50,000 to help make it happen. So, as a thank you, the trio posted this acapella rendition of the Firefly theme, aka The Ballad of Serenity.
