Listen to the sound clip Do it. from Firefly - Season 1: Do it. Do it. This sound is from Firefly - Season 1 Firefly is a critically acclaimed American science fiction television show created by Joss Whedon. The show first aired in 2002 and unfortunately only lasted for one season, despite a dedicated fan base. Set in the year 2517, Firefly follows t… Go to the full soundboardwith more sound clips Search