The Block has been rocked by cheating allegations after a shocking radio broadcast left contestants reeling.
On Tuesday night's episode, Mitch and Mark set off a trail of destruction when they accused Jesse and Mel of copying the designs for their apartment.
WATCH: The Block rocked by cheating scandal
Appearing on Triple M, the pair told former Block contestant and radio host Jess Eva they believed Jesse and Mel had used design ideas from another St Kilda apartment block in the designs for their own.
"I think Jesse copied his apartment," Mitch declared.
“Oh, that must be the Saint Moritz that he’s copied his apartment from?” Mark asked, pretending to be confused.
Jess then spilled everything to Jesse and Mel, who couldn't believe what had happened.
"Mitch and Mark pretty much accused you of cheating," she explained.
Mel was furious and Jesse hit back with, "If you wanna have a barney, let's have one."
And when the other teams heard the cheating accusations live on radio they were blown away.
"Holy dooley!" Matt shouted.
"This is just going to blow up," Tess told Luke.
