Created by Russell T. Davies (who also created the original Queer as Folk), It's A Sin is based on Davies' life as a young man in England during the HIV/AIDS pandemic of the '80s and '90s. To best honour the subject matter, Davies made sure to cast gay actors in It's a Sin to play the gay characters. Frustratingly, that's not always a given with LGBTQ+ stories.
"With this show we made the conscious decision to try [to cast LGBTQ+ talent]," he told The Hollywood Reporter. "What we discovered was such a vast tornado of queer talent dying to be on screen that it was an absolute joy."
According to Pink News, Davies originally wanted It's a Sin to be a multi-season show. But in the end he was glad it was shortened to a miniseries with less of a time commitment. That way he could get the talented cast that he did — even if just for five short episodes.