Howells puts in a strong turn as Henry Paget, a Victorian marquess who blows his inheritance on hosting wild parties and staging gender-defying theatrical performances Playing the shy Colin in Russell T Davies’s 2021 TV drama It’s a Sin, Callum Scott Howells had to be the humble caterpillar compared to Olly Alexander’s extravagant butterfly. But now Howells gets an upgrade to full butterfly status in this high-spirited and good-humoured drama from screenwriter Lisa Baker and director Celyn Jones