Video – Grey's Anatomy 6.04 "Tainted Obligation" – 3 Sneek Peeks

This week Izzie debuts a Kate Gosselin-esque hairdo, and Meridith's pappy makes an unexpected visit.  Hot stuff.  Here are three sneek peeks.

THATCHER GREY RETURNS TO SEATTLE GRACE WITH A MEDICAL EMERGENCY, AND ONLY MEREDITH CAN SAVE HIM, ON ABC'S "GREY'S ANATOMY"
Guest Starring Jeff Perry as Thatcher Grey.
"Tainted Obligation" – When Meredith and Lexie's father, Thatcher, returns to the hospital with a failed liver, it's up to Meredith to save his life. Meanwhile, Izzie empathizes with a patient riddled with tumors, as Mark, annoyed with Cristina's competitive zeal, tricks her into assisting on an unusual surgery, on "Grey's Anatomy," THURSDAY, OCTOBER 8 (9:00-10:01 p.m., ET) on the ABC Television Network

"Grey's Anatomy" stars Ellen Pompeo as Meredith Grey, Patrick Dempsey as Derek Shepherd, Sandra Oh as Cristina Yang, Katherine Heigl as Isobel "Izzie" Stevens, Justin Chambers as Alex Karev, Chandra Wilson as Miranda Bailey, James Pickens, Jr. as Richard Webber, Sara Ramirez as Callie Torres, Eric Dane as Mark Sloan, Chyler Leigh as Lexie Grey, Kevin McKidd as Owen Hunt and Jessica Capshaw as Arizona Robbins.

Guest starring Jeff Perry as Thatcher Grey, Ralph Waite as Irving Waller, Tom Amandes as Charlie Waller, Isabella Hofmann as Irene Waller, Jocko Sims as Randy and Kristen Ariza as Angela,

"Tainted Obligation" was written by Jenna Bans and directed by Tom Verica.