January 04, 2013 at 12:00 PM EST

Tensions are going to run high on Monday night’s all-new episode of Castle.

In the episode, Darby Stanchfield reprises her role as Castle’s ex-wife, Meredith, who reappears to help care for her daughter (Molly Quinn) after the college student is stricken with a bad case of mono. That in itself isn’t so bad, right? Well, it is when you consider the fact that the former Mrs. Castle decides to stay over at Castle’s on the same weekend as Beckett, whose is sleeping over while her home is being fumigated.

Can’t wait for a taste of this disaster in the making? See an exclusive sneak peek from the hilarious episode below, and tune in to a new episode of Castle Jan. 7 at 10 p.m. ET.


Midseason TV schedule for 2013

TV 2012: EW portraits

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