10/30/2013 12:01 pm ET

'Grey's Anatomy': Awkward Tension Flares Between Meredith & Cristina In 'Thriller' (EXCLUSIVE)

The tension is still high between BFFs Meredith Grey (Ellen Pompeo) and Cristina Yang (Sandra Oh) in the Halloween episode of "Grey's Anatomy" titled "Thriller."

Meredith's having a Halloween party for her kids and the kids from daycare, but Cristina didn't get an invite. Ouch. Is it because she doesn't like kids, Cristina asks? Because she sure likes Meredith's.

The official description:

It's Halloween and the doctors of Grey Sloan Memorial are hit with a barrage of spooky patients, which affects their own plans and puts one doctor’s well-being in jeopardy. Meanwhile, Derek collaborates with Ben on a new surgical technique, and Richard angers Bailey when he asks a second year resident to perform his next surgery, on a special Halloween episode of “Grey’s Anatomy,” THURSDAY, OCTOBER 31 (9:00-10:00 p.m., ET) on the ABC Television Network.

"Grey's Anatomy" airs Thursdays, 9 p.m. ET on ABC.