In this week's Grey's Anatomy, Abigail Spencer returns as Megan Hunt to call out Owen (Kevin McKidd) for his recent poor life choices, and it's great. I mean, Owen did monumentally mess things up with both Amelia (Caterina Scorsone) and Teddy (Kim Raver), so he deserves the reckoning he's about to receive from his kid sister.

In an exclusive sneak peek at Thursday's episode, titled "The Whole Package," Hunt takes Owen to task in a rant so scathing we're pretty sure his next move is to head to the burn ward for recovery.

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"It's a lot. It's just so much stupidity that my brain is struggling to take it all in. I mean so...much...stupidity!" Megan says in the clip. "You went to Germany for one night, knocked her up, and then screwed it up so badly that you gave her your job instead of a ring? You dum-dum!"

And when Owen pointed out her juvenile use of the phrase "dum-dum," Megan had the perfect response: "What you did here was so stupid that the word idiot felt too sophisticated so, yes, I'm sticking with dum-dum!"While Owen and Teddy deal with the fallout from Megan's surprise visit, Catherine (Debbie Allen) will have her hands full with surgery on a war veteran who's not emotionally prepared for the major operation. Plus, Meredith (Ellen Pompeo) will worry about DeLuca (Giacomo Giannotti), who's working alone with Richard (James Pickens Jr.) this week.

Grey's Anatomy airs Thursdays at 8/7c on ABC.

Abigail Spencer and Kevin McKidd, <em>Grey's Anatomy</em>Abigail Spencer and Kevin McKidd, Grey's Anatomy