"The Day the Night Stopped Beginning to Shine and Became Dark Even Though It Was the Day Chapter One: I Saw You Dance" is the twenty-seventh episode of Season 4 of Teen Titans Go! and the one hundred eighty-fourth episode overall. It first aired on 1 August 2017 on Cartoon Network.
Cyborg becomes trapped in the alternate reality of Night Begins to Shine with a dragon who wants to steal the song for his own evil purposes.
This episode aired as the first of four parts of a television special entitled "The Day the Night Stopped Beginning to Shine and Became Dark Even Though It Was the Day" (advertised as "The Night Begins to Shine" on Cartoon Network).
CeeLo Green and Fall Out Boy guest star as themselves, making them the third and fourth guests to appear on the show (after "Two Parter: Part Two" with "Weird Al" Yankovic, and "The Cruel Giggling Ghoul" with LeBron James).
This episode was aired alongside the premiere of OK K.O.! Let's Be Heroes.