Only Heaven Knows, a musical about a young Melbourne man who discovers the queer delights of homosexual desire, unexpected intimacies and gender transgressions in Sydney’s Kings Cross in the 1940s, has been revived in its thirtieth anniversary year at the Hayes Theatre in Elizabeth Bay. The director Shaun Rennie had reservations about staging a late 1980s musical about the 1940s, wondering if it would be a “museum piece”.