ABC's "Grey's Anatomy" - Season Six [Getty Images]

GREY'S ANATOMY - "Holidaze" -- As Thanksgiving, Christmas and New Year's pass, Miranda is visited by her father, William, who disapproves of her choices in life; meanwhile, Mark and Lexie must cope with the shocking arrival of a woman from his past, and Thatcher Grey questions the Chief's recent behavior as Meredith comes to his defense, on "Grey's Anatomy," THURSDAY, NOVEMBER 19 (9:00-10:01 p.m., ET) on the Walt Disney Television via Getty Images Television Network. (Photo by Danny Feld/Walt Disney Television via Getty Images) ELLEN POMPEO

Walt Disney Television Danny Feld