Viewers of the ITVBe show have seen Diags accusing Tommy of cheating on his girlfriend Georgia Kousoulou during a night out in Newcastle last year.
Tommy has denied it.
On tonight's episode (18 March), we'll see Arg becoming involved in the drama when Diags suggests Arg knows more about what happened than he's letting on…
Preview pictures show Diags and girlfriend Fran Parman becoming embroiled in a massive argument with Tommy and Georgia at the cast's St. Patrick's Day party.
According to sources, it's an "argument of monumental proportions, even by Essex standards…." Wow.
While Diags and Tommy have been facing off on the Newcastle issue, former besties Fran and Georgia have their own drama as Georgia's been accusing Fran of not talking to her for weeks.
As you'd expect, each girl is supporting her man.
Georgia has said she's standing by Tommy as she believes he's telling the truth, while Fran has told a Twitter follower that she thinks Georgia is "in denial".
TOWIE airs Wednesdays and Sundays at 10pm on ITVBE.
Who has hooked up with who in TOWIE?