The fourth season of the sports entertainment reality competition series Australian Ninja Warrior premiered on 26 July 2020 on the Nine Network.
[2] On 17 October 2019, the series was officially renewed for a fourth season at Nine's upfronts, also confirming Fordham, Maddern and Flintoff were returning.
[7] Co-host Rebecca Maddern, was temporarily placed in self-isolation and replaced by Shane Crawford for two heats, before being cleared and returning to filming.
[8][9] Crawford returned to the season as the sideline commentator for the semis and Grand Final after Freddie Flintoff had to fly back to the UK before coronavirus pandemic measures came into effect.
Returning athlete Ashlin Herbert received a 10-second advantage for the semi-finals, after beating Daniel Mason on the Power Tower.
Returning athlete Sam Goodall received a 10-second advantage for the semi-finals, after beating Matt Filippi on the Power Tower.
Returning athlete Zak Stolz received a second chance advantage for the Grand Final, after beating Jordan Papandrea on the Power Tower.
Returning athlete Charlie Robbins received a second chance advantage for the Grand Final, after beating Matthew Bowles on the Power Tower.