Huge shift coming to The Block: Major fallout between teams 'changes everything'

It's been all sunshine and roses on The Block... until now.

According to one explosive promo, that you can watch above, Han and Can pull a "sneaky move that changes everything".

Once Sonny and Alicia find out what's been done "behind their backs" the fallout that nobody saw coming erupts.

Stream every episode ever of The Block for free on 9Now.

In the sneak peek for tonight's episode, Alicia calls Han and Can over and she's not backwards in coming forwards.

"Why would you that? Why are you copying?" she presses the House 2 contestants.

But it seems that not everybody agrees there was a copying crime.

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Han and Can vehemently deny any wrong doing

"We absolutely never copied the idea," Can pleads.

While Han insists "we haven't done anything".

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It seems Alicia's not buying it. "These girls better have a good excuse," she demands.

Perhaps there's one thing everybody can agree on... it's no longer one big happy family on The Block.

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"It is over. O-V-A-H. Over!" Mat declares to cameras.

What exactly causes this massive fallout? You'll have to tune into The Block tonight at 7:30pm to find out.

Want more Block? Dan and Dani have roast the Main Bedrooms and Walk-in Robes as they inspect the rooms here:

The Block airs Sundays at 7pm and continues Monday to Wednesday at 7:30pm and Sunday at 7:00pm on Channel 9 and 9Now.

Stream every episode ever of The Block for free on 9Now.

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