Rob Narita

Izzie cannot ignore the chemistry she shares with a patient awaiting a heart transplant; George treats Bex, a teenage hermaphrodite.

When a series of deaths occurs at Seattle Grace, the uncanny events bring out the doctors' superstitious sides and make Izzie nervous about Denny's surgery.

The race for chief heats up as a new competitor comes forward; Callie must reveal a big secret; Derek treats a patient close to him; Alex continues his work with Jane Doe.

Tony (Tony Danza) gets carried away trying to be supportive of Sam's (Alyssa Milano) new relationship with a Wall Street genius (Dan Gauthier).

Hunter and Molenski investigate a series of rape/murders that revive disturbing memories for Molenski

Robert refuses to accept that his son, Bobby, has ADD (Attention Deficit Disorder) and tries to cure him without therapy. Rapper WARREN G guest stars as Warrant Officer G.