Doctor Doctor (also known outside of Australasia as The Heart Guy) is an Australian television drama created by Tony McNamara, Ian Collie and Alan Harris, which premiered on the Nine Network on 14 September 2016, lasting five seasons, concluding on 23 June 2021. The cast includes Rodger Corser, Nicole da Silva, Ryan Johnson, Tina Bursill, Hayley McElhinney and Steve Bisley, and follows the story of Hugh Knight, a rising heart surgeon who is gifted, charming and infallible. He is a hedonist who, due to his sheer talent, believes he can live outside the rules. His "work hard, play harder" philosophy eventually comes to 'bite' him.