Aaron Brennan, played by Matt Wilson, made his first screen appearance on 16 June 2015. The character and casting was announced on 17 May 2015. Wilson relocated from Sydney to Melbourne for filming. Of his casting, Wilson said "it's surreal. This stuff is part of your living room growing up and never in my wildest dreams did I think I would have this chance." During the waiting period after his audition, Wilson watched the show "religiously", which made him want to be a part of the cast even more.