Grey's Anatomy: 10.07 'Thriller' - Promo

Here is the promo for next week's Halloween episode of Grey's Anatomy:

“Thriller” – 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, THURSDAY, OCTOBER 31 on ABC.