It's Always Sunny in Philadelphia (2005)

S12E1 The Gang Turns Black

While the group is enjoying a screening of The Wiz, their electric heating blanket suddenly shorts out. To their shock, they glance in the mirror and discover they've transformed into Black versions of themselves. To return to their original selves, they embark on a wild adventure, navigating through a series of classic body-switching antics and challenges along the way.