Actress Nancy Travis will guest star in an upcoming episode of ABC’s “Grey’s Anatomy.” In the episode Nancy will play a character named Allison, who is a patient in Derek’s Alzheimer’s clinical trial. Her 10-year-old son takes more care of her than she is able to take of him, which leads Dr. Stark (played by Peter MacNicol) to contact Social Services.

Nancy is best known for her roles in the movies “So I Married an Axe Murderer” and “3 Men and a Baby,” but she also recently guest starred on ABC’s “Desperate Housewives.”

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