And at the commitment ceremony, it looks like the experts will be laying down the law.
"The end of this experiment is very near," says John Aiken. "Tonight we need you to be honest and vulnerable."
Viewers will also be holding out to see the situation between Jess and Mick unfold. Jess has already made her husband, if you can call him that, stay for several weeks so she can get to know Tamara's husband Dan.
WATCH: 'Married At First Sight's' Jessika Begs Husband Nic For A Second Chance.