 Ahead of Season 3, during a promo which screened in June 2018 on the Nine Network, it was revealed that the show would be losing a major character; in a spoiler, it was revealed to be Jim Knight.In May 2018, it was announced, that Steve Bisley would be returning for the third season, however, he only appeared in the opening episode.In April 2019, it was announced that Dustin Clare, Kate Jenkinson and Robyn Nevin would be joining the cast of "Doctor Doctor" for its fourth season.