Emmy-nominated actress Elisabeth Moss will guest star on NBC's medical drama Mercy, TV Guide Network's Hollywood 411 reported exclusively.
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The Mad Men actress will play Lucy Morton, a cancer patient who has lost her hair from treatment. Taking a tip from Grey's Anatomy's Izzie Stevens, Moss' character will don a head scarf to cover her baldness.
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Most of Moss' scenes are with Veronica (Taylor Schilling) and Dr. Harris (James Le Gros), and she will be shooting on Friday in a New Jersey hospital. Her episode will air on Nov. 4.
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