CALLIE IS FORCED TO REVEAL A BIG SECRET, WHILE TENSIONS BETWEEN IZZIE AND GEORGE ESCALATE AND A NEW COMPETITOR ENTERS THE RACE FOR CHIEF, ON ABC'S "GREY'S ANATOMY"

Academy Award�-Nominated Actress Shohreh Aghdashloo Guest Stars as Patient Helen Crawford

Elizabeth Reaser Returns as Jane Doe.

"Scars and Souvenirs" � The race for chief heats up after a new competitor enters the fray, tensions escalate between Izzie and George, and Callie must reveal a big secret. Meanwhile, Derek treats a patient near and dear to him, while Alex continues his work with Jane Doe, on "Grey's Anatomy," THURSDAY, AUGUST 2 (9:00-10:01 p.m., ET) on the ABC Television Network. (Rebroadcast. OAD 3/15/07)

"Grey's Anatomy" stars Ellen Pompeo as Meredith Grey, Patrick Dempsey as Derek Shepherd, Sandra Oh as Cristina Yang, Isaiah Washington as Preston Burke, Katherine Heigl as Isobel "Izzie" Stevens, Justin Chambers as Alex Karev, T.R. Knight as George O'Malley, Chandra Wilson as Miranda Bailey, James Pickens, Jr. as Richard Webber, Kate Walsh as Addison Shepherd, Sara Ramirez as Callie Torres and Eric Dane as Mark Sloan.

Guest starring are Shohreh Aghdashloo as Helen Crawford, Elizabeth Reaser as Jane Doe, Jeff Perry as Colin, Roger Rees as Thatcher Grey, James Gammon as Lewis Scofield, Mare Winningham as Susan Grey and Rob Narita as anesthesiologist.

"Scars and Souvenirs" was written by Debora Cahn and directed by James Frawley.

"Grey's Anatomy" is broadcast in 720 Progressive (720P), ABC's selected HDTV format, with 5.1-channel surround sound and Spanish audio via SAP.

This program carries a TV-14 parental guideline.