Kathleen Erin "Kate" Walsh (born October 13, 1967) is an American film and television actress, currently known for her role as Dr. Addison Montgomery on the ABC dramas Grey's Anatomy and Private Practice.
it follows the CEO of a small UHF television station who stumbles upon a broadcast signal of snuff films. Layers of deception and mind-control conspiracy unfold as he attempts to uncover the signal's source, complicated by increasingly intense hallucinations that cause him to lose his grasp on reality.