The Seven Network owns the current rights to NFL broadcasts within Australia and that includes Hard Knocks which broadcasts for free on 7Mate.
Here are the ways to watch each episode.
Episode 1 is available to stream anytime on nfl.com on this link.
Alternatively, it will be on 7Mate @ Wednesday 23 August 12:00am - 1:01am
7Mate @ Tuesday 29 August 12:00am - 1:10am
7Mate @ Tuesday 5 September 12:00am - 1:00am
7Mate @ Wednesday 13 September 12:45am - 1:45am
7Mate @ Wednesday 20 September 12:00am - 1:05am