[1] For the first time in the show's history all of the coaches returned: Delta Goodrem for her eighth, Kelly Rowland and Boy George for their fourth and Guy Sebastian for his second.
Following the exit of Sonia Kruger, Darren McMullen, who hosted the first four seasons, returns with new co-host, Renee Bargh.
[3][4] In June 2020 the Sydney Morning Herald reported that Marcia Hines and The Veronicas were to fill in as guest mentors for Rowland and Boy George respectively, who will be mentoring their acts remotely from the US and UK because of travel restrictions in place due to the COVID-19 pandemic.
The top 20 contestants who win their Playoff or are chosen as a Wildcard move on to the Showdowns.
[9] Coaches George and Kelly were allowed to bring back an eliminated Battle loser to fill in for Caleb and Ella, George choosing Elyse Sene-Lefao and Kelly chose Jimi the Kween.
At the end of the episode, the coaches were allowed to take one artist each through to the Grand Finale due to the COVID-19 pandemic.